Well my experience with flaps is very limited only have two aircraft that I fly with elevator flap combination. Your bell crank only has a limited ability that controls the flap elevator combination. If rigged properly your throw between the two controls should be about the same. A lot of that is controlled at your handle. If your using a hard point handle. A handle with cable lead outs usually cannot adjust that belcrank throw. That’s what is nice about a hard point handle also a bias and non bias handle can offer a wide variety of adjustments. That effect the throw of your Bel crank and control throw. Usually with a flap configuration you need less throw because the relative wind changes over the elevator creating more lift to the elevator so you need less of a throw with flaps. Line drag is also a point of interest. Less line and lighter line weight all fall into air craft control. Shorter lines increase circle speed and your prop and engine also effect the air crafts performance. Proper weights and wing counter weights of a well balanced aircraft will increase its performance. If your lines go limp in a wing over something is not right. And until that’s corrected you should never attempt any other manouver AJ