Sliding Lid RAMPS 1.4 box (Q56370)

I know, the last thing we need is another RAMPS box... but I wanted to put up the updated Sliding Lid Project Box, and demonstrate the new screw hole option. I also thought it would be good to show an actual use of the parametric box. The original box did not print the actual holes for screws, just screw blocks you could drill into. That was because I felt that printed holes were hard to get accurate, and this could lead to plastic cracking stresses. Now holes are printed as a star shaped hole, a bit like some masonry mounts. These will accept a lot of different screws and not stress out. There are now two parameters to separately specify the screw hole, and the hole in the lid.