So the current MA props (7X4) are the Scimitars, not the regular style. I have some APC 7x5s and some MA 8x3s (combat props) so I think I will just have to try those. The plane is really stable but it has a very slow climb rate and top speed is definitely below 50 MPH. Unfortunately I will be going on vacation Friday for a week so won't have time to test any of these theories until I get back. I will keep you all posted, though.
Thanks.
Tim