Why bother "bashing" the BUSA kit (which would amount to almost entirely redesigning it)? Instead just start with the much more scale, true 1/6 scale, 66" span Aerodrome EIII kit (with barndoor ailerons on a more scale airfoil). This is designed with electric in mind, but it shouldn't take much work to beef it up a bit for glow power.

http://www.aerodromerc.com/