No.
Just pull the clip that is in the end of the little slider out, remove slider.
Take off the funny looking paper clip things, look at how these go, pull out pads.
Screw back piston with a screwdriver or like, make sure the slot is horizontal, as there should be a little knobble on the pads that fit into slot.
Reassemble, swear like fcuk when getting the little slider back in, as you will think it will never fit.
Good luck, should take 10mins.
I swear that eventually only goes in through the power of magic each time!
Don, done it yet?
Well, do we have brakes or not?
Well at least you got them done.