Yes all nodes were teste4d, both side nodes do not work, however the top one does. I always use part clipping in building these sorts of things Otherwise more intricate designs could not be done I did have a look into the part file itself, following the part pattern, i could manually attach parts via editing the craft file, just adding the correct values to the position, and linking nodes. Sub-assemblies are a good idea, however there is the problem that i kinda need to attach them via the side, which i have been able to do before, but alas no longer. The whole size ratios between the structural hubs and the structural modules are wierd -.- i don't know if it is exactly related to the issue, but i was able to place down 63 of the structural hubs before they stopped attaching via the sides. Regarding the post linked earlier, yes that is probably the problem, which means no direct fix, damn.