Fitment of acrylic –
Acrylic Can vary in thickness from 2.8-3.5mm in some cases, the average is 3.1mm Thick. This can cause some fitment issues with the bases.
9/10 times it will fit perfect, but In the odd case it doesn’t, the slots can be sanded out with normal sandpaper to increase the size slightly.
If its the other direction and the slot is too large, a couple of pieces of vinyl can be added to the acrylic that’s being inserted in thin strips, to slightly increase the thickness locally.