Thanks. I had to experiment with your instructions (they weren't working at first) to discover my keymaps are/were messed up. I have to change many because I'm left-handed. I had something double-assigned, but even after fixing that, it's not quite there. And even if it were, it's hard to align things exactly / can't see the corners with the glowing edges of the blueprint.
Is it possible my settings (move precision, etc) were wonky when I *took* the blueprint that causes the offset when copying? e.g. Does "placement" if the whole construction being blueprinted copy into the blueprint, as opposed to just the construction elements being copied?
I wonder why the modular snapping is so far off on this one blueprint and not the others? I've blue-printed it twice from different directions to try to change the handle, but it came out the same.
Thoughts anyone?