I bought a new Lee 4-20 a few months back but used it for the first time yesterday. Cleaned it good, lapped the valve rod to seat firmly (may not have been needed, but it sure didn't hurt), and I am very pleased with the initial results.
Only real challenge was adjusting the flow. Once I got that down I was in business. Knocked out about 100 Lee 200 gr. 44 cal rnfp with a 2 cavity mold before the garage got too cold. Indy is enjoying singly digit temps.
This is my first experience with a bottom pour pot. Been a dipper for quite a few years.
A lot posted about negative experiences with Lee bottom pours, thought I'd post a positive report.