[hharney]

For take-off I use the bottom of the white mark (up trim) with the published 1/3 flaps. I have the Horton Stol wing and normally rotate at 75 - 80 indicated although the aircraft is already asking to leap off the ground.

For landing I use 1/3 flaps on downwind (160 MPH) and then slow it to 140 MPH for the gear.
On base I use 2/3 flaps and final full flaps. While base to final I will use 110 - 120 MPH and full up trim. When I add full flaps on final then the trim system allows more up direction as desired. On final I use 100 - 105 and normally end up full up trim with full flaps. Once the runway is made then let it bleed to 75 or 80 for touchdown. I find if you land with too much speed you may experience some hard landings or maybe the "porpoising" you might be experiencing. Keep in mind with my numbers I have the Stol wing.

Yes the elevator is a little heavy but use the trim to assist and you will find that your landings will be greasers. The Skymaster is a very easy airplane to land.