Well I
finally got the clutch sorted. So this is the final set up I used fitting the Nova shoes with a Robinson Racing flywheel on a HPI K4.6 engine.
Fitted the flywheel without any shims.
Machined down the tapered end of a MBX-5 clutch nut, so the overall length is 7.5mm.
Shimmed out the nut by 0.5mm using steel shim, (this gives near perfect alignment with the ends of the springs)
Installed the shoes using Mugen 1.0mm springs (shimmed out the shoes by 0.25mm using teflon shims)
Fitted a 0.25mm teflon shim in front of the nut and then installed the clutch bell.
Fitted another 0.25mm teflon shim on the outside of the clutch bell, followed by the brass spacer and another 0.25mm shim.
Fitted the standard screw in the end of the shaft using thread lock.
I probably didn't need to be quite so fussy, but that's just the engineer in me !
Hopefully this should do the job !
Thank you guys, for all your help.