you want to keep it light. This plane will not handle a evo 46 let alone that saito 65

the Saito is 10 ounces and only uses a 4 ounce tank for 4-6 min 3d flight
the evo is 18 ounces and will need a 7-8 ounce tank and alot of reinforcement on the plane
the 65 is 19 ounces and requires the same fuel tank and even more strength.

saito 40 is the best only real option out there for this type and size plane.