I have 3 RCBS Pro Melts that have served me well for 20+ years. Have conservatively pored more than
500,000 jigs of various sizes through them without a problem other than a yearly cleaning of the pot.
I recently had 2 of them rebuilt by RCBS. New pots, new stems, new rheostats, and new heating elements
for $100 each pot. You just can't beat these pots............