[NickRCarter]

Thanks Fred, I knew what you meant.

Randy, Idle set a 10 degrees. Weights removed motor restarted. Rev to 1500rpm timing advanced to 35-38 degrees give or take, Vacuum line removed of course.
I have just noticed that when I secure the rotor cap to the plate via the two screws the whole unit becomes more difficult to moved as if something is binding. If I slack off the two screws lightly it frees it up. I think it might be a combination of two things. 1) Too heavy springs & 2) Probably more importantly the whole mechanism is binding.
Any ideas why it would bind and secondly why the previous run with springs in with these weights caused a retard in the timing?
Nick