my build:
https://forums.maslowcnc.com/t/my-hinged-wall-mounted-80-20-strut-channel-maslow/8844
Regarding “triangles”, I’m not that familiar with the “default” frame design. I’m just referring to using triangle supports to make things more structurally sound. In very simplistic terms, if you build a square, its corners do not have as much strength to resist forces applied to them compared to adding an additional support to make a triangle in each corner of the square.