Hello Ron,
Thanks for the info.

. . . It uses glow ignition and runs at extremely high speeds.
Wonder how he stops everything from flying apart :-)
Really good workmanship and design?
Pity he doesn't keep/make drawings as it would make for a great
article on one of the hobby magazines.

It doesn't idle below about 4000 RPM. At least it didn't the last time I got to see it run!
Sounds like some wild cam he's using.
Must have sounded great.
Regards
Geoff