Unfortunately the company my mate worked for went out of business 6 months ago :roll but here's a close up of the hanger & he used the standard OEM rear hanger as a template so dimensions & offset can be taken from that & easily reproduced.
So is it in the same position as the standard hanger? It looks like a harris hanger, he did a good job of it.. My understanding is that the sp cans have a unique bracket? Are they not the same as the arrow shotguns?
OOps my bad :dowhat sorry forgot yes it was originally made the same as original hanger for single can.
Then it was altered slightly as the angle of the bottom lug needed to be changed & shortened to fit the arrow cans. The measurements from the centre of the frame bolts to the centre of the hanger bolt 168mm & 233mm