Here's a mod I did to my Goldberg Chipmunk to slow the landing speed. The front part of the flap rotates up like a spoiler when the rest goes down. It puts a load of drag on the airplane, so much that you usually have to ADD throttle to get to the runway threshold. The old flaps made the nose pitch up and I had to mix in down elevator to compensate. This setup drops the nose, so I've mixed in some down. I'm not sure if the down pitch is from all that drag down low or from blanking out part of the stab and loosing the download, but it's still fully controllable.