the trick with the Kombi is you need to run the engine for 1/2 an hour, then tip it over on it's side. Then hold the joint of the mast over the flames. Once the ferrule has heated, it should pull apart. The advantage of this method is
1. you have done the driving public a favour
2. you have fixed your mast at the same time
nothing like killing two birds with one stone hey! Aparently there is a similar trick to eliminating "inlaws" and XD Falcons, by putting one inside the other and pushing off a cliff.
Hope this helps

Rick