Just would like to publically thanks Chris Lyons for organising that bulk deal on the dizzy kit. Got mine last Thursday, installed it Friday, no real problems except the timing kept retarding back to Zero. This was because the plastic bit on the dizzy shaft wasn't all the way down, due to the front screw having an earth wire under it. As this earth wire is for the points it can probably be removed, but I moved it to the other screw, just in case it was necessary. This allowed the plastic sleeve to sit down further & now it has stopped retarding the timing.
I then found out the muffler had collapsed & was choking the motor. So I was forced to fit some extractors & a 1 & 3/4 inch exhaust system I had in the shed. Much better.