Created this seat support to be able to use the Luna seat I was using on my Sherman Max.
Simply put velcro on your trolley handle and the seat support. The bond should be strong enough for normal seated riding.
I secured the mount with the seat by using 4 M6 nuts and put some Loctite to make sure it will not move.
I personally set the seat by using the bolt from the back as a guide against the edge of the trolley handle as shown on the photo.
The screen is actually readable while riding standing since your head will be more forward (the pic from above was taken while standing behind the wheel)
I printed mine with Overture TPU 30% gyroide Infill
The author marked this model as their own original creation.