Well, I started to write a reply and then decided it was overly negative. Let's just say that I've been wrenching on TRs for over 30 years, and never felt it was worth the money to me.
When I bought my 59 TR3A in 1984, CA did a smog inspection for every car that changed hands within the state. I'd never been through a state smog inspection before, so I tuned it "by ear" to be as clean as possible. Got it so clean that the station actually flunked it, saying it was too clean! Went home, tuned it normally, went back and passed with flying colors.
"We don need no steekin gas tester"
:laugh: