The LT40 will climb pretty easy with that flat bottom wing.

If it were me, KISS; Keep It Simple!
[ul][*] I would make sure you are flying slow (very slow, but not near stall speeds, this will reduce the control surfaces sensitivity)[*]Fly low, maybe 50 feet or so down the middle of the runway[*]Hand it off low and slow, and ask him to fly the length of the runway (maybe beyond, we have trees) nice and slow and *Level*[*]You may have to do this for the entire flight (maybe a couple flights)[*]As my last resort; I would set the radio up where he has nothing but elevator, I would control everything but hand off the one surface till he can fly it level

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I feel for you, thank you for taking the time and putting in the effort!

Cheers,
Steve