Awesome build!
Just stumbled upon this thread as I was looking for a way to have Hammerschmidts installed on an old Park frame (pre-Big Ben and Park "v2" which I believe BMW started to produce in 2010). I have ISCG tabs but an American BB, so with any adapter for the Hammerschmidt Euro BB I guess the ISCG tabs are too far away for the Hammerschmidt plate to be installed correctly. What BB do you have on the Big Ben and did you have any trouble fitting them?
