Blic magneto - no discernible difference when advancing or retarding...

[Ruairidh Dunford]

I have been playing around with the timing on the Cup Model and discovered that, despite the points holder rotating as it should when moving the control lever on the steering column, it makes no difference to the running of the engine. 

This is not the case on the Chummy, where full advance and full retard alter performance greatly.

Is this a feature of "some" BLICs or is something amiss? 

I would like to be able to alter the timing manually, for obvious reasons.