I bought one from Terry, and it works awesome !!! No leaks !!! If it is one thing over the years that has been constant pain, is no matter how clean, or how much silicon goop, etc, you try with the original style t-stat housings, they always leak !!! Terry's works PERFECT !!! Just remember you need the later style (1980 and up) t-stat to use in his housing (smaller diameter stat) . . . .

Cheers
Mark