just to put my 2 cents in, as a scratch builder of r. c. sport flyers, i use the 8 tenths rule in that the fues is 8 /10th s as long as the wingspan as measured from the prop to the evevator hinge line. and the 2/3 rds rule that the front of the fues is 1/3 the fues total length measured from the prop back to the balance point. as for the rear stab height look at the profiles of most ww-II fighters and you will find the stab above the trailing edge of the main wing. most notable is the bf-109. mike