Each to their own... Although, I've tried your method of not using as much TPA, and my brake still felt shite, so I decided to properly clean the whole system, and see if that would solve anyting, and it did. Different people will have different problems, your brake might be fine apart from too much TPA, whereas other's might be really old, and have gunk and what-not stuck to the pistons. My method worked for me, so I though i'd share it. It seems to have worked for a fair few other people too, even after trying to use less TPA. EDIT: Spelling.