Wow, I had no idea this thread had progressed! I saw it again in alt.coffee. . .
I've had AndyS's thermofilter and Fluke meter for a week, and it's been eye opening. I realize that at least on my machine (Expobar Pulser) I need to have some realtime monitoring, so I'll be getting the
adapter that lets you install a thermocouple into the E61 grouphead.
If my machine has been sitting, then even if I flush 8 seconds from boiling and immediately lock and pull I can get up into the 204 range. If I do the same thing on the next shot after a short recovery, then I'm down around 200 where I wanted to be. The relationship between the HX water temp and the grouphead temp is really interesting.
Anyway, Andy is great, his setup is about the most intense home espresso setup I think I've ever seen, reminded me of Back to the Future. I joked with him after telling him about my temp results that he would probably need counseling if he had to control his brew temp with just the HX flush! He can dial his setup into absolutely anything, I can't wait to try some espresso.
The rental program from espressoparts sounds terrific! It is a huge investment for the Fluke and Scace (would be more than I paid for my machine since I got it used) so if Andy hadn't been local and so generous, that would be my only option as well, except for winning one in the contest, of course!
Wes