No I think it is 54mm AF alright, whats put me off them is they are one of the Paypal /worldpay band and I am tired of these middlemen that just fuzz the clear transfer of money. Whats wrong with a credit card? Have decided to make my own either a crowsfoot as you suggest or I have a big tube spanner with a bit of grinding might do the job its 52mm so I only have to open it up a bit (not as if I want to be 200 foot pounds on it anyway!)