I recently changed the rear pads & discs on a 2016 Toyota Yaris & strugged to get the piston to seat back into the calliper so that I could refit it. It turned out that you have to turn the piston at the same time as trying to push it home.I've never had this issue before, but I'm only used to working on much older cars. Is this because of the design of the seals nowadays or some other reason? Thanks.