Compression fittings are ok on lines that don't deal with lots of pressure - not brake lines! Compression fittings on a fuel line = ok. Compression fittings on brake lines = HACK. Ever see compression fittings on brake lines from the factory? Didn't think so. With cheap-*** bean counters running the show, the factory would do it if they could get away with it. Think there's a good reason why they don't use them???