Hey mate,
Glad it helped!
It was probably an oversight on my behalf not to have an option on the first sheet to select imperial or metric units ;)
I still havent added the charts that Joecar suggested either :ermm:
I need to revisit this soon to try to tune drone out of my car - lol
Damn exhaust has a shocking "drone-zone" 1700-1850 rpm so I think I'll just use the tool to stop the converter locking until engine speed will be 1950+ ;)
If you made any other changes other than the imperial speeds then send them through and I'll include it in the next version.
Cheers and thanks for your comments :)