Hey I'm using BitComet too and based on the things ya said I'm thinking on switching but I have 2 question before I do that:

1., If I've downloaded 99.8% of a file (or any percentage of it) can I continue it on another bittorent client?

2., Might that happen that if I cannot find any seedlers on BitComet than I MIGHT (not defenetly but maybe) find even just ONE seedler to the file I'm downloading (now thinking maybe there are no seedlers to it since BitComet is blacklisted) on another client?