Well I won’t say I’m never going to buy another set of Speedmaster heads

318willrun said
As an owner of SM heads, and the fact that I may order again from them, I'd like to know what they forgot.

I started to explain it in an earlier post that was trampled on by some site jokesters. I put a lot of time posting tech but won’t be waisting my time for awhile. Why bother we can talk about whatever they want to teach us.