I think you're confused over the functions of speed brakes verus flaps......a speed break will be installed in the fusleage, or top of the wing, or on the bottom of the wing directly under a speed break on top of the wing.....it's function is to increase drag..slowing the aircraft.....
Flaps are installed on the wing.....there function is to increase the curvature of the wing.....allowing the wing to generate lift at lower airspeeds.....a side effect of flaps is increased drag.....therefore you need more power to counter drag and maintain the same airspeed. but at the same airspeed the lift has increased so the aircraft will baloon up on you.......
there is a couple of things you can do to slow your aircraft for landing.....most important a nice slow idel, with the correct sized prop.....descend on the downwind leg, level off on the base leg.continue the descent on final.....if all else fails side slip the aircraft side to side....this requires rudder and opposite ailerons..then reverse it all so the nose of the airplane swings side to side while keeping the wings level.....
lastly remember that elevator is your speed control......
Hope this helps you some...Good Flyin