You may have 10 landings to get it right, but I would dial in about 20% down elevator to start out with (frankly thats not near enough for 40 total inches of flap, but its a safe start) and apply them slowly about 100 feet up so you have plenty of time to react.

That is about the amount of flap I have on my Skybird and and I was mixed in at about 35% as I recall. I am switching radios though and I will have to go through this all over again.