DIY Snake Rack Build

This is my second snake rack build. This time it's based on smaller tubs for my hatchlings. This is probably more of a grow on rack than a hatchling rack in size, but I'll be using it for my hatchlings. Links to the tools I used are below.

TOOLS:
Manually Operated Steel Plate Folding Machine 760mm Workshop Folder: https://amzn.to/3lVdrRu
Blind Rivet Nut Gun: https://amzn.to/2PDPqSF
Drill: https://amzn.to/39Qn7bb
Drill bits: https://amzn.to/3sHThgi
Speed square: https://amzn.to/3rMJHY8
Engineers square: https://amzn.to/2PtBqve
Files: https://amzn.to/3mdY2vL
Workbench: https://amzn.to/31rkvfm
Vinyl for workbench: https://amzn.to/31sIf2p

TERIALS (you will probably find these cheaper elsewhere, but it may help with the search):
Machine screws: https://amzn.to/3cu6Pqb
M6 Rivnuts: https://amzn.to/3mhvL7G
Castors: https://amzn.to/3fyJ3ew
4-way aluminium corner connector: https://amzn.to/3fwCnO2
3-way aluminium corner connector: https://amzn.to/2Pleq1z