Enclosure for Anycubic I3 Mega

This is an enclosure for Anycubic I3 Mega 3D printer.
It is based on "Square Tube Connectors / Joints + Plexiglass support" that you can find here: https://www.thingiverse.com/thing:2927377.
I added here also two support, a and b, that help to place the enclosure over the printer.

This is a work in progress and I have not yet tested how it works.
I'll be back with update soon.
I also plan to add a fan to force the air through a filter.

Bom:
4 pcs of aluminium square tubes 15mm x 15mm x 472mm
4 pcs of aluminium square tubes 15mm x 15mm x 416mm
4 pcs of aluminium square tubes 15mm x 15mm x 375mm
2 pcs of plexliglass or polycarbonate sheet 468mm x 371mm x 2.5mm
2 pcs of plexliglass or polycarbonate sheet 412mm x 371mm x 2.5mm
1 pcs of plexliglass or polycarbonate sheet 468mm x 412mm x 2.5mm
8 pcs of Joint-a [Note 1]
24 pcs of Joint-b [Note 1]
24 pcs of Joint-c [Note 1]
24 pcs of GlassSupport-a [Note 1]
80 pcs (about) of GlassSupport-b [Note 1]
2 pcs of supp