sphere60 thicker version

improved version of crab's eiffel sphere for the 3mm version.
I noticed the the 3mm version ended to be really fragile and also hard to assemble, so I managed to make it more solid increasing the thickness o the parts.
uploaded all the 4 parts in dxf format
cutted with my chinese 100w laser, also added the rld file of it, with inner and outer tolerances of 0.07mm.
for all the number of parts please see the original work of crab:https://www.thingiverse.com/thing:4609
modified first with fusion360 then with illustarator.