IKEA LACK enclosure post adjustable and more solid

# IKEA LACK enclosure

I modelled an improved IKEA LACK enclosure entirely from scratch, because I was not happy with the designs that I found on the internet.

## What to improve

I found the Prusa IKEA LACK enclosure, I printed it and build the enclosure, but I ran into problems like:

* parts were installed with a single screw, this allowed parts to freely rotate and not feel very solid.
* part positions were not adjustable after you screwed it on the wood, which for me caused the plexiglas to bend because I was a few millimiters off.
* there is a few millimeters gap around the entire plexiglas
* the plexiglas holders were exactly as wide as the plexiglas itself, which resulted in them being too tight

## About this design
I created my own 3D models from scratch and fixed the problems I was having with the original design. My design uses 4 screws to attach the plastic parts to the table and instead of having only one chance to precisely attach the parts on the right l