If you read the post, earlier in this thread, from rcgypsy, you will see that he changed the incidence of the stab to correct the need for trim change. He also said he could have changed the thrust line of the engine.

He is a member of my RC club and an excellent builder. He has over 40 flights on the Sprint - most off of grass.

He has Scratch Built so many beautiful models over the years. We just attended a local Float Fly, yesterday, at a pond near our home. He brought his Spruce Goose, with 8 electric motors, that he has been flying for several years. It was flawless.. You may have seen his Red and Black Travel Air that has been featured in the NEAT Fair footage and in several model magazines.

He has dozens of exquisite scale RC models.