I was told categorically by Watsonian that the crankshaft assemblies were the same for the AVL and UCE engine. That they the UK importer got it wrong (again) does not really surprise me. They were absolutely no use to me whatsoever.

Dont get me wrong, I really love my little Enfield, but the Avl's do seem to suffer from poor quality control. I have no knowledge of the UCE bikes as if I had to go left foot shift I would buy either a new Bonnie or MG Breva. The AVL bike is the last bike made with right foot shift and after 50 years of right foot shift I dont want to change as my reactions in an emergency have always been right foot change even after five years using a BMW with Left foot change. I never really was at home with it. I was at ease with the Enfield almost immediately

It is odd the Hitcocks blame the soft conrod for bearing failures, Priceparts have found that nearly all bikes that fail early have case hardening flaking off the crankpin and do so at about the 8 to 11K miles range and have one or more of the following.
a 'go faster' kit fitted.
a bigger gearbox sprocket.
running too far advanced. (pink when pulling away) mine doinks instead of thumps pulling away like a diesel cement mixer. It may be the efi has a different ignition system that is not fixed at manufacture with some form of adjustment or compensation for ignition timing.