ok, thats good enough for me. i bought a XR2 one as they open up earlier don't they? but i've got the wrong one, as it doesnt fit in the housing and looking at the state of the rubber o-ring behind the 'stat, it could do with replacing so was just gonna ditch it all together if it was ok to do so.

guess i'll just have to get me another o-ring and bang the old one back in