I'm gonna be rebuildling my wheel cylinders this weekend, I got the rebuild kit (pretty sure they gave me the wrong one). I'm taking the backing plate of tomorow and the wheel cylinder(s) (I got a split wheel cylinder deal on my '50 Dodge). My uncle will hone them out then. Is there anything I need to know before I do this? I suppose all it is is put the new rubber cups back in and re-use spring and piston right? Any special method of taking these out or putting them back in?