Mini360 Box with V-Slot

Please help me to build some points by liking and downloading from - https://www.printables.com/model/1346320-mini360-box-with-v-slot

I've just added a v-slot adapter to mount on a printer frame, its a little loose and could do with a reduction in distance where the v-slot piece meets the back of the box

edit: i've reduced the clearance by 0.25mm between the v_slot and the box; should fit better. not tested.