Hey guys, the Companion and Patrol wing structure is essentially the same, the aileron cross member will be different as well as the bell cranks. The cables in the LSA and Patrol travel opposite direction of those in the Four, Five, Companion. If you have built your cross members, and bell cranks those would need to be remade. The gross weight of the Companion compared to the Patrol has to do with several factors, among which are wing span and landing gear, the geometry of the Patrol gear leads to a softer gear with more leverage on the shock struts. This gear would be very soft at 2200 lbs, were as the gear on the companion is not overly soft at those weights. CG wise the airplanes very drastically the Patrol is best suited to a IO360M1A parallel valve and the Companion needs a heavier motor and is better suited for the IO390 or angle valve 360. this heavier motor allows the baggage weight to increase enough to actually put some weight in the airplane.