K8200 GT2 timing belt rework

I recently decided to rework my K8200 3D-Printer for using GT2 timing belts instead of the original T5 versions. For this I needed to design new clamps for fixing the ends of the belts to X and Y tables and I planned to do this with integrated length adjustment for belt tension.
I also needed to consider the lower diameter of the 20 teeth pulleys compared with the original T5 wheels. Result were the model files included to this project upload.
I originally thought I could use the original mou