BTW I just realised I was lying about the Kontronik numbering scheme, getting it confused with Hacker so I've edited the original message.

For Kontronik the 2nd number is not the number of turns it's related to the motor constant Kv (rpms/Volt) so it works the opposite way round to what I originally said. Higher number = hotter motor. Sorry .

Don't you wish they'd all get together and do it the same way ?

Steve