Thanks Jeff for the info about the focal plane and focusers I'll keep that in mind. I also don't have a 3D printer so my design is slightly different, he also said in the article it take 20 minutes so set up so I'm trying to make it as easy as possible to set up. I was able to attach the truss connectors to the primary mirror today so here's some photos of that.
#1 The mirror cells and ground boards. I'm using the offcuts from the corners to make random things like blocks to center the mirror and also make a lot of practice attachments and glues and things like that.
#2-4 Making and attaching the truss connectors for the lower end. They're made from 10mm aluminium tube which I cut to length and flattened in the little vice. Originally I used a sandwich maker to heat them first, but when I broke one and didn't have spares I didn't bother heating it, so I don't think heat was necessary. To attach them I drilled a 4mm hole sideways into the mirror cell and then put an 8mm hole vertically to so they met, that way I can tighten them as much as I like.
The connectors stay permanently on the mirror cell in transport but the trusses will come off.
Sorry about the lateness of this post, I had to reduce the file size of all my photos.
