Sorry, I posted in the Conventional forum to continue my old post. Really believe I belong here.

Well, here I am a couple of months later with my tub up and running great and my new topside on the table in the living room. After much thinking, I decided that I just couldn't take a drill to my tub for the new thermowell, I'd rather chicken out and add it to the PVC piping. (I know, I know) Since I did all the PVC for the tub I've got plenty of room and I've become quite good at the plumbing stuff. Now, I'm here feeling like a fool. I've got the PVC thermowell and can't figure out how to get the thermostat probe in. Do I just squeeze it through the little rubber gasket? I'm afraid that I'm going to rip it apart. Thanks so much.

It's a topside unit for an AP-4.

Perhaps I should have waited until my new contacts came in. When I looked more carefully, I answered my own question.