OK. Once again I didn't do my homework
I let Wai Guy sell me another pump. The pump he sold me has proved to be quite good so far though.
Tony;
If I can get the shaft out of the Mag18, I will gladly take you up on your offer of repair kit pickup. The impeller is still good, the shaft is toast. Also there is a small rubber flapper (purpose unknown) 2cm upstream of the impeller(in pump housing) that is also toast. If this small part is not part of or unavailable in the repair kit I'll ignore it for now until I can reason its usefulness.
If I can't remove the shaft, we might aswell forget the whole operation.
For your troubles I can provide a frag or two of your choice (acro, birdnest, or whatever are you interested in.)
Kari