Laser Engraver Mk 2

I have made a few improvements so decided to call it Mk 2 rather than mess with first design. I have included 123d files so you can adapt / alter them to your needs

I have worked hard on this and hope it will be used by others.

All parts were printed on an Anycubic i3 Printer , Bed size 210 by 210, End parts need some fiddling to get them in the slicer but do fit diagonally.
Square holes are for Microswitches, I used the following.
https://www.ebay.co.uk/itm/331890551081
UPDATE:
The l