In reply to Mr Harry:
> I had a look and reckon I could get a new-classic g12's on the Scarpa trainers, but how would they fit on the B3's?
I have a pair of Scarpa zen-pro-mid-gtx very similar to your approach boot/trainer.
I just tried fitting a Grivel G14 to one whilst it will go on and seems tight. The absence of a heel lug
means the rear clip digs in above the rand in order to hold the crampon on.
Two things to note. One, you can feel this through the heel of the boot on your achilles
and two it not does seem like it will stay on very long. Also there is a huge gap between the toe and
the front of the crampon which may lead to snow building up.
Good luck with your search I think getting something flexible for the approach shoe that works for the B3 as well will dependant on use case probably just lead to an awful compromise. I cannot see this combination working well and will be sticking to G14's on my B3's only which as you would expect they fit as they should.
Post edited at 11:24