I think the GP Ultimate Bipe 40 would be a reasonable third plane if you have someone test fly it for you and set it up with low rates and some exponential. I love mine. Mine is well behaved and has no bad habits. The only criticism I have is that the visual image in flight can be confusing - partly because it is small but also because of the extra wing. It should fly well with a 65LA. I'm using a Saito 72 4-stroke - not too different in power or weight.