OK so... Thankyou for the pics Janson, were very helpful Tried what you said, and it was not moving at all. Until it moved a little bit. Then, as you rightly suggested, my head xploded 'cos i took a screwdriver to a £300 hub. So, off i trotted to the King Importer (Bromley Bikes) and spoke to Howard in there, he gave me lots of things to think about. According to him, Kings NEVER slip, and the slipping trials riders feel is infact the grooved part of the axel end ripping out a bit of alu from the frame dropout. Also, King never made 'Trials Springs' as they were sold as a few years ago. The spring actually has very little to do with the engagement of the hub, its the pedalling force that moves the drive ring. Told him about stretching the spring, and he said that'd do nothing to help the hub. Apparently it takes the force of a Porsche Carerra engine to make a King slip. So..... Its having a spring retainer fitted, and I asked him nicely to run it on Tri-Flow, and we shall see what happens. Was an interesting excersise anyways, right or wrong about what he said, he certainly knows his way around a King. Shall update when i get it back on Friday