i always had a set of these belt covers on my ender 5 an out of the blue i started getting layer shifts on my x axis so at first i thought my belts had stretched an needed tightened so i printed a belt tensioner an realized i couldnt use the cover with the tensioner so i cut it up in tinkercad so that it would give u access to the tensioner knob an clear everything so now it mounts just like b4 but now gives you access to the knob. hope it helps anyone who had these an wanted belt tensioners but had to pick one.