Tekno Neu is great for Tekno conv. kits(certainly it should), but not as "universal" as standard sized motors like Medusa or CastleNeu.
The regular Tekno Neus are the same size as a standard finned Neu. The Q can Neus are the ones that are better off in a Tekno kit. I've seen people use the Q can motors in an E-Revo before and it fit, but it's harder to make it fit.
All I ever wanted was an honest weeks pay for an honest days work.