where to start?

[trounce]

Little update....
Got all the outer sections cut yesterday and welded together today, now I need to get some flat 3mm sheet for the plates to make all the removable braces.
I was a little worried about getting the cuts perfect but you've gotta love plasma discs for perfect thins cuts

The frame all measures the same from corner to corner and the gaps between each brace is spot on so I'm pretty chuffed nothing got messed up in the welding process, only thing I was a little concerned about was the weld penetration. There seemed to be quite a lot of weld laying on top even though the welder was set to maximum.
However I moved it all around and nothings fallen of yet so it seems to be ok :rofl:

@JAZZ - I've got 4 offcuts leftover with which I'll use to brace the four corners, when you suggested the removable braces should run the same way and said three per bay that would make 12 in total including the larger 60 x 60 pieces?