Large Delta With CNC Modular Frame

This is the design of a delta printer I made in 2015 when I had still access to Solidworks.
I routed the upper and lower box elements and keys on a friends CNC table out of flooring boards and similar easy to cut pressed fiber/particle boards. By subdivision of the frame I achieved that there are only 4 distinct frame element types, that are keyed together and overlap in such a way that the frame becomes quiet stable. This implementation uses solid 12mm shafts of 1m length. The shafts are on 80mm centers from each other. The build volume should reach beyond 420mm diameter and 500 high...
I use 8mm hollow carbon rods 500mm long.
I apologize there is little to no backup info so far and most parts are not proven and will likely be replaced! I might upload the solidworks files possibly online in onShape because adapting the slot width depending on the wood you use might be laborious and less accurate otherwise (but it is probably possible to modify the dxf cut patterns)
Please remix