Is this all you have to do to remove the Main part of the calipers?

"Go behind caliper and pry off the two rubber caps protecting caliper pivot pins. Use the 7 mm allen socket to remove the two caliper pivot pins. As the second pin is removed support the caliper at the same time you move it forward so as to be able to pull out the pads. Note that the inner pad snaps into
the piston. {rear inter pad has clip that slides over lip of piston-don’t pull out as
in front but slide and lift up etc.) Don’t leave the caliper hang on the brake line.
Use a coat hanger or bungee cords to support (hang) against the spring etc."



Is it just the two bolts for the main part of the calipers

 

for caliper only, yes. this also allows access to change pads.
edit: be VERRRY careful not to let caliper hang from flexible brake line, make sure to support housing with a coat hanger, wire, or something, hanging from flexible hose can damege hose and shorten life of brakes.

 

that will remove them, but are you replacing the pads?

If so, the rear piston must be turned to be retracted, do a quick search and you will find a post on how to turn and retract it at the same time.

In the end, and really big c-clamp is the best tool for the $.

 

I was able to push & turn the rear pistons using a set of needle nose plyers. If you got the C-clamp route get 6" the 4" is not big enough. Changing both the pads and the rotors is a very easy procedure. Did mine about 6-8 weeks ago and the MINI still stops. Life is great with a MINI that stops.....