poortomsacold said:Well this morning I finally braved this task but sadly without success - the torx bolt by the spring is stuck fast and sadly the thread has given way slightly so I don’t think I now have a way of undoing it. Have tried an 8mm ratchet spanner and normal 8mm spanner with star head. As soon as I get some pressure on it the spanner now slips up and off. So I think that the only way of me getting this job done would be to remove the whole unit so I can get the dodgy bolt off which all seems a bit of a disappointment sadly.
I had this issue, it didn't seem to budge to the point where I nearly gave up. I had to make sure the ratchet was securely on, and apply a decent amount of pressure while trying to keep good contact with the nut.
I used this: https://amzn.eu/d/2YDqpTR and it was the perfect size.