I hope you're not replacing a 10 megohm potentiometer with a
50K ohm one and no series resistance.

While extending the pots to the front panel might work in
theory, you're doing it in a very noisy environment. It
might induce noise that will affect your timing. Those pots
need to be very close to the circuit board.

Eric R Snow wrote:
The Pause time pot is a 10 megohm and the
Pulse is a 50k ohm device. Since the Pause pot has so much more
resistance it is very hard to finely adjust. I will be replacing it
with a 50k pot. In fact, I am going to replace both pots because the
ones in the kit are trimmer pots and I want the adjustment knobs on
the front of the welder.