Reason is I've got an old pump that suffers from roll outs and a freak insert kit, can't get a freak back for the pump as it's a unique thread, anyone prepared to have a go at boring one of the two barrels I've got to fit freak inserts in? - theres a bloke who does it in the US but if someone can do it over here it'd save the head ache of international postage, I can probably get all the dimensions for it.