Adjustable X belt tensioner

Hello friends,

I have made this X ?belt tensioner because the other solutions were not optimal. The solutions in which one carriage could not brought much adjust.
The belt tensioner consists of a base plate and a lever. it is a M3 screw tightened. thus is a fine adjustment possible.

good tip: take, where appropriate, larger washers for the side of the ball bearings

So i hope you like it