It's possible to put a blade into a Mac Daddy (Inno True-1) as seen in this picture (not mine.)
It just takes a lot of trial and error with cutting and trying to insert the blade.
As for the Dolomite I've had two friends who have snapped the blades in their OPS. The first one was near impossible to simply heat and remove the blade. He ended up cutting the blade off and slowly chipping and filing away at the inside of the shaft in order to fit a tapered blade. On the other hand my other friend made minor cuts at the fuse point, heated it up and pulled it out easily.