Yes, I created this one: LowRider 3 CNC mod: HIDE / PROTECT either of the Y AXIS BELTS inside metal strut / unistrut / superstrut) (v1.0)
( Printables download here: LowRider 3 CNC: HIDDEN BELTS MOD! Hide/protect either/both Y axis belts inside metal strut / unistrut / superstrut (v1.0) by Doug Joseph (design8studio) | Download free STL model | Printables.com )
…and Fabien drew some inspiration from it and created this one:
( Printables download here: Lowrider 3 CNC - Side-mounted Y belt by Fabien T. | Download free STL model | Printables.com )
Mine works flawlessly, and I have been using it for many cut jobs. I delayed posting it on Printables and by the time I did, it had a great track record for me. I’m sure Fabien’s design works as flawlessly.
Basic difference is mine is for hiding belt inside superstrut while his works without superstrut.