K1C with CFS - how to adjust belt tension

Flagship K Series Creality Flagship K1 & K1C
1

Hi,

I have a K1C with CFS upgrade, recently, during prints, the Y axis seems to shift when go to High speed. I believe it is a belt tension issue, but how can I adjust the belt tension with the cutter installed? any suggestion?

2

This has something about tensioning. Does this work?