In reply to mike kann:
Hi Mike
I remember Hugh Banner enthusing about his new product which had similar design characteristics to the Mamba at a trade show.
They came out at the same trade show as I recall. Not sure if folk had sussed out then that rubber bands could hold a krab in the correct orientation.
Hugh was apparently trying to design stronger gate open strength krabs.
He was delighted when a trip to the reference library showed that this had been extensively researched for crane hooks in the nineteenth century!
Anyway , as discussed to me, a lot of heated arguments in the trade as who thought of which design tweek first.