well....
i finally got the pulley and then blower re-installed tonigt, started the car up and again it's making the same noise.
So i got on the blower to paxton, a different tech support guy watched the video and said "yeah, that's fine" !!!!
So the general theory is, i'll put a couple of hundered miles on it and see what its like, if there's any problems i'll try sendoing it back, but for now...
MOT... Mapping... Enjoying....
Expensive, yet supprisingly happy days