progressive 4 pots
 

does that mean i have to keep them the correct way around, as the original car

-ie what comes on first, the bigger or smaller piston
-then is that supposed to trail the next piston coming on?
-ie a taper-the rear edge against the rotation?

ie again
-looking from the left of the car
-if the piston is on the back -towards the back of the car
the wheel then goes anti clock
-is it big or little piston on top, to taper the pads
-or am i talking poo

My Brembos have the bigger piston on top. So, the smaller piston comes first.

Always the smaller piston first - rotation-wise.