ProtoArc EC200 seat pan knocking
Hey everyone,
Hoping someone here has run into this issue or knows a good fix.
I recently got the ProtoArc EC200, and there is an annoying "knocking" / "clacking" sound coming from under the cushion whenever I shift my weight or lean to the left.
Here is the weird part: the noise directly depends on the seat depth setting.
- Seat pushed all the way back: Loud, noticeable knocking sound when leaning left.
- Seat extended all the way forward (max extension): The sound completely disappears and the cushion feels totally solid.
It seems like something has extra side-to-side play when pushed back, but not when having the cushion fully extended.
All the main mounting bolts under the seat are fully tightened, and the seat depth lever is definitely locked into a notch.
Has anyone dealt with this specific slider track issue on the EC200 or a similar mechanism? Is there a way to fix it? Or should I just file a warranty claim for a new seat assembly?
Appreciate any advice!