Aluminum truss telescope - work in progress

Here are some early views of the "mirror box" and truss bottom connections. I used 2 bolts at each junction in the corners to build a rigid box. All the aluminum pieces for the box were cut with a mitre saw with a metal-cutting blade.
The ends of the top pieces on the mirror box are bent slightly upward so that the truss tubes are angled in to neatly meet at the top. These ends are not "sprung", but actually rest on the heads of the studs which, in turn, rest on the aluminum structure beneath. The construction is very firm and inflexible.

I used a University Optics mirror cell for supporting the mirror in this scope, but for the 12,5" version of this same design that I'm building now, I'll make my own cell.