How long to change discs and pads

[Niall]

One thing I see a lot of people do as a rookie error.
When you try to push the piston back, don't expect it to go with a nice easy movement. Instead, find your prying tool of choice (I use a big flat head) and just apply pressure to the piston and it will creep in. I see so many people trying to shock them with loads of force and it just won't have it lol