SteamDSXL. Give me your opinions.
Super solid construction (see last .gif of me flipping this thing around.)
Pro(s): Dual screen desktop mode, or playing handheld NDS/3DS/WiiU.
Stands on its own, lightweight, low profile, single cable, low latency.
Gyro is really fun in games that support it. (OOT, MM, WindWaker, New Pokemon Snap, StarFox Zero, Etc.)
Downside(s): I haven't found a screen that supports passthrough charging which means there no charging and playing at the same time unless you add a USBC Dock and some more cables and make it look ugly and unwieldy.
The rear kickstand + a table + Steam Controller (2026) is pretty nice way to keep playing while charging, but removes all handheld portability of this setup. Hasn't been much of an issue though, the screen only consumes ~5 watts and you can power limit the deck itself to sip power during emulation and get awesome battery life for long play sessions between charges.
Inspired by: u/Responsible-View-365's post: https://www.reddit.com/r/SteamDeck/comments/1ok6nam/3d_printed_dual_screen_mod_for_jsaux_mod_case/
>ALL PARTS:
>* JSaux Modcase: https://jsaux.com/products/modcase-for-steam-deck-pc0104?variant=43680549372124
Note: I use the Basic Set that comes with the kickstand. I don't use the included silicone battery strap because I use the 3D printed part below in its place.
>* 3D printed slide-on attachment: https://www.printables.com/model/1201712-steam-deck-phone-mount-for-jsaux-case
Note: DO NOT use the magsafe ring included in the PRINTABLES link above, we are only using the 3D printed plastic part from the above link, we instead want an articulating magnetic mount so you can extend and angle the screen around the SteamDeck vent. See the "magsafe mount" link below:
>* Magsafe Mount: https://www.amazon.com/dp/B0DHG2MJNM
Note: You will need a pair of flush cutters to get the hinge of this mount to fit in the circle portion of the 3D print. or you can modify the .stl if you want, but it would affect how it prints. I found it easier to just cut away a tiny bit of plastic.
>* USBC powered touchscreen: https://www.amazon.com/dp/B0DF1P542S
>* USBC cable: https://www.amazon.com/dp/B0D5H9MQ5C
Note: "Up Angle" was preferred. I attempted the "U-Shape" but it had a weird kink to the cable when used. Returned it for the "Up Angle" which is what is used in this post.