Found that the peg brackets were way to wide for the H model pegs.

where it mounts.

therefor the return spring sits inside the peg, so to speak.
Basicly a easy fix is to order H model springs instead of E2-E4 springs as they are much chunkier than the H model.

On the H models the return spring sits on the outer of the bracket as the bracket width is much shorter. as shown below

Thanks to Trev for the above pic
any thoughts would be appreciated
Spawn