Try reflexing the ailerons down a bit. This should help to get the wing out of the water then build up speed before easing in elevator. The 40LA wouldn't be my choice. It's not enough power. Not for me anyway although I can get the plane airborne with my Webra 50 well throttled back to about what I guess would be a similar or less power level. If you knew the plane well you might get it into the air (I think LA used to stand for Lame A**) with a struggle if you are not cruising around with a death grip on the up stick.

Put a strong 46 in. It will fly. Thousands do. It's fun.