Well my boot pop kit came today via DPD and I wasted no time putting it in. Will use the eBay dealer again when I need to order stuff when away from home.
Mod works ok most of the time, backed the bump off with a, anti-clockwise turn and it has responded better, although it is very cold here and it may be affecting it (I hope!). Got going eventually but very slowly to begin with when it does. Think it'll need more adjustment in daylight.