Hello bafflerback.
Try a 17 x 8. APC Thin E or Xoar E:
http://www3.towerhobbies.com/cgi-bin...?&I=LXEYH0&P=7
http://www3.towerhobbies.com/cgi-bin...?&I=LXAPUA&P=7
A few of us (in the Sequence 1.20 thread over in RC Groups) have been playing with 17 x 12 even.
Tim