Foxalien Masuter Pro Y shortened belt tensioner

This shorter Masuter Pro Y axis belt tensioner extends the stock Y axis work area up to 430mm.
You will need:
Longer belts
Print 4 of them
4 M5 hex nuts
Flip both Y end stop brackets on the frame by 180 degrees
Move the front cable chain mount forward by one bolt hole

Route the belt through the slot, fold it on itself so the teeth intermesh, and feed it back through the slot. A small pin or piece of 3d printer filament will help keep it locked in, but i've found that even as-is the belt can't fit back through the hole.
A shorter tensioning bolt will help, but you can make do with the stock ones if you tighten the T-nut bolt just enough so it still just about moves when tensioned.