Lightening flywheel - TR3a

[a Wallace <wallaces@superaje.com>]

I know I read about this somewhere, but once again I can't find it. I 
really thought I had printed it out.

Can someone give me your thoughts on this matter? I have a 30 lb flywheel 
sitting here; it seems like it could lose a few pounds (5? 7? 10?) without 
significant effect on the idling. So my questions are two:

1. How many pounds can I take off and still have a pretty smooth idling 
car, and a flywheel that won't fly apart at speed and remove my ankle?

2. From where should the excess be removed?

TIA,
Jim TS81417