Here's version 2, going back to 4 rollers per side, now using the "optimized" roller curvature and a flexure based capture mechanic for the roller axles. Blocky to allow the animation to run at a reasonable speed. You can see how the contact patch with the ball passes from one side of the wheel to the other smoothly.

Hi

I'm facing frequent USB connection issues with my endgame.

whenever i try to connect it to a PC via a USB, I get "Unknown USB device (devide descriptor request failed)"

I'll have to plug/unplug it multiple times before it vonnects successfully (although there is no issue with bluetooth connection)

is this a hardware (trackball) issue or a windows issue?

also, i think i saw in some video about endgame that once you connect it to a PC, the device shows up like a storage media and you can access the firmware. is that still true? because mine doesn't (never) show up as a storage media

I've been using the MC Saite Trackball for a while now, and I wanted to share some first impressions.

Overall, I'm actually enjoying it more than I expected.

I can remap all of the buttons using SteerMouse on macOS, which makes it much more flexible.

Since it uses a 55 mm ball, anyone who has used a Kensington SlimBlade should feel comfortable almost immediately. The ball movement feels very familiar.

The button layout is also similar to the SlimBlade, with four main buttons. In fact, I think the button placement is even better because they're positioned where they're easier to click. Personally, I find it more comfortable than the SlimBlade.

Things I wish were different

My biggest complaint is the scroll wheel placement.

I really wish the scroll wheel were located above the ball instead of below it. Every time I want to scroll, I have to move my hand away from the ball, which interrupts the workflow.

To work around this, I'm using SteerMouse Chords to enable a scrolling mode, so I rarely need to touch the physical scroll wheel anymore.

Another downside is the switch noise. The click sound is quite loud, similar to the SlimBlade. It's not a big issue at home, but it's definitely noticeable in a quiet office.

Modding plans

I'm thinking about modifying the trackball.

My first idea is to:

• Replace the switches with silent switches
• Replace the stock bearings with silicon nitride (Si₃N₄) ceramic bearings

I'm also considering something a bit more ambitious.

I'd like to disassemble it and see if it's possible to rotate the sensor board by 90 degrees.

If that works, I could physically rotate the entire trackball by 90 degrees so that the scroll wheel ends up on the right side instead of the bottom.

I think that layout would be much more ergonomic for me.

Since I already remap all of the buttons with SteerMouse, changing the physical orientation wouldn't be a problem.

I've included a link below that shows the teardown photos and internal structure, in case anyone is interested or has experience with this kind of modification.

https://forum.trackballs.eu/viewtopic.php?t=150&sid=c299f37244fc9914f1a9ba9d05cdd1ef

Any thoughts or suggestions would be greatly appreciated!

3d printed, made with Arduino and optical sensors from PS2 optical mice. This is my first release. Very functional for 3 axes rotation of objects or sketches

I think we're due for an update, a bit tidier now.

Cheers!

(sorry for the repost, had trouble with imgs).

Sharing for fun - thanks so much for your support on this build, and special thanks to jfedor for sharing his great designs with the community. I'll link this particular repo in the comments.

The mouse works great and is sooo satisfying to use. The scroll ring bearings offer a buttery-smooth experience that is fun to use and easy on the wrists. I plan to print a tent to further enhance hand-positioning and comfort.

My Setup:

- 3D Printer: Bambu A2 Mini
- Filament: PETG Basic, Red
- Basic Soldering iron $12 (link)
- Cheap Multimeter $10 (link)

Fun fact, ChatGPT was a huge help -- it scanned the repo and helped source parts and construction. Reddit filters keep blocking my links to chatgpt + parts list + pricing in this post, I'll include all in the comments.

This Frankenstein controller output as mouse and keyboard. I used rewasd to map the whole thing into a virtual Xbox 360 controller. It works wonderfully. Now I can have precise movement on controller! Will try it out on other game genre soon.

I would like to straighten the bottom side of the trackball, to reduce the casing size and move the trackball center point closer towards the shared wrist rest pad.

Has anyone done something like that before?

How much material can be cut away without damaging the internals and structural integrity too much?

Just the corners or some of the middle part as well?

Of course I intend to fill the hole with some hot glue or similar material to seal the internals.

Three years ago, we released the Adept. It sat at a beautiful nexus of functionality, blending together the greatest features of QMK, 3D-printing, and open-source.

Today, I get to share with you the next version of the Adept. It's been improved in every way that we can think of, while retaining everything about it that you loved. We're calling it the A+.

I've written an in-depth blog post about the A+ that covers everything: new features, the great things that haven't changed from the Adept, links to design files that you can analyze right now, a keymap diagram illustrating functionality, everything.

We'll be opening up a preorder on Wednesday, August 19th, 2026 at 10:00AM ET (here's a countdown timer for you), for A+ Trackballs (DIY kits and fully-assembled units) starting at $99CAD. There will be two preorder tiers:

• Tier A preorders will ship out within 8 weeks of our launch date.
• Tier B preorders will ship out within 16 weeks of our launch date.

We also have a very limited Early Access Tier, which contains a small number of fully-assembled A+ Trackballs that are ready to ship immediately. If you manage to snag an Early Access preorder, it'll ship out within a few days.

Questions and comments are welcome!

Doing Schematics and PCB layout back in the early 2000's this was by far the best trackball I ever used.

Mass production has already been completed, and we should be able to start selling it very soon.

Specifically, we expect sales to begin within the next 1–2 weeks. (It may even be a little sooner.)

I’m really looking forward to the day when we can finally bring this new product to all of you.

The four products being newly introduced to the U.S. market this time are:

• IST Plus
• Bitra Index Finger model
• Bitra Thumb Ball model
• New Ball Support Unit

The new Ball Support Unit is compatible with existing models that use the bearing replacement system, such as the IST series, Huge Plus, and IST Pro.

We’re also currently developing a DEFT Pro renewal model, so please stay tuned!