i just called RCBS customer service and they are now charging $200 for a new replacement for out of warranty machines. bummer.
Jerry, before you toss the one you have, you may try a few things if you haven't already.
both of the ones i've had really don't like static and will cause the drifting issues you mentioned. are you using the clear shield while at the range? what about the pan for powder, is it the metal one provided? i ask because i really like a little black powder pan that has a funnel built at 90 degrees and make dispensing a little faster, but can cause problems when outdoors and the temps go way up and humidity way down. add a little wind and you may have static building up in all that plastic.
there are anti-static sprays out there that help but the best thing i've found is to take the clear shield, plastic dump tray(if you use one instead of the metal one provided) and round plastic platform that holds the powder tray and dump them in water. pull them back out, let air dry and try it again. this usually solves my drifting problem, at least for a little while.
what kind of battery setup are you using? i carry 2 sealed cell 12 volt batteries with me. make sure your battery has a good charge. i had a problem at the range once with a low battery and fixed it by swapping to the other one.
one more thing about the powder. i've reprogrammed mine to be faster with powders like 133 in the 29 grain range. if you've done the same, it will most likely overthrow with LT32. mine did.