Hey Peter,
I don't want to discourage you, but 10 ips would represent a lot of vibration. That would be a very high number. When I balance a prop, I aim for a velocity of less than .05 ips. If it's not just a simple out of balance propeller situation - for instance if you have something loose, or a gearbox or engine problem - it will be hard or impossible to balance the prop. It will be interesting to see what results you get with the C145.