can any one tell me is there a special tool for tightening and loosening the 6 little screws that fasten Shimano brake discs (m515 cable discs) to the wheel hub?. I just used a simple allen (hexagonal) key to tighten them but it didnt really feel like it fit that well and I am not at all confident that I will be able to get the screws out again. Now I looked more closely at the screws they don´t really look like normal internal hexagonal screws but look a bit more star shaped.
I would like to rebuild the wheel and need to get the disc off.
Can any one help?