Some while ago I bought some 123 blocks from RDG. These have been used for parallels, raising blocks etc up to now. The other day I needed to square up some Ally blocks and wanted to bolt two blocks together to give me two vertical faces for the edge and side of the blocks, a couple of clamps to hold the ally and I should be ok. The blocks have tapped and clearance holes so should be a doddle to bolt them together with two 3/8" UNC capscrews.
NOPE the tapped holes are 3/8" UNC the clearance holes are 9mm. Queried it with RDG and told "they are not designed to be bolted together".
I am surprised, should I be?
Richard