Hmm, I found the post but I think I ditched the pictures because they're not showing up in the threads. Anyway, the probe will seal nicely in a 1/4" compression fitting where you replace the ferrule with a little stack of small O-rings (found in Lowes).
They're great. I have a 3-tier stand and it was a pain trying to monitor the temps before I installed them, especially in the HLT. Also, since they have alarms, I just set the temp that I'm shooting for and they let me know when I'm there - nice.