This is a remixed of a CR-10 Y-Axis Belt Tensioner (by donnyb99). ALL credits to original creator. Much appreciated. I just remix for my FLsun.
That being said, this Y belt tensioner should work with most configuration that uses dual guides such as CR-10 S4 and S5. Support belt up to 10mm wide (common on large size printer).
This Y belt Tensioner was intended to use with this HD Y Motor Mount that I remixed but can be use separately if the height of the belt is ~20mm.
https://www.thingiverse.com/thing:3157264 HD Y Motor Mount
You should double check your bed clearances and also the height of your belt before you print.