I've got one I could part with since I upgraded to the auto trickler. I'd agree with Jumper, it's pretty good, but sometimes you have to rethrow a charge a couple of times if your are looking for precise powder charge.
I sent you a PM. Reference the drifting issue, I think it would benefit much from a better power supply. There is a business in CO I think that repairs these. They basically only do 2 things: replace the primary circuit board or the power supply. If the drift bothers me enough one day to attempt a fix, replacement of the power supply is the first thing I'll do. It's cheap and easy to try.