a real challange?

[Kevin Kuehn]

I would only adjust what's known to be replaced, then reevaluate and proceed from there.

I'm not so sure that generator is going to serve you justice. I'm not familiar with it's circuitry, but unless you have a frequency counter it's hard to know how accurate something like that is.

It would be best to use a plastic blade screwdriver, or in a pinch you can sand a flat blade shape on the end of a wooden dowel.