"Ground effect" is a function of the aspect ratio of the wing. Ground effect is half the wingspan. It doesn't matter if it's a high wing or low wing plane. A Beaver with flaps will outperform one without. The Beaver has a unique flap system if done correctly or true scale. The flaps are linked with the ailerons and the ailerons droop with the flaps. It's a great flying plane with or without flaps but better and more fun with.

Can't wait to see the additional comments.