tell ya what, go out and get a J3 cub and toe the wheels out and fly it. Then toe them in and try it!!

I have been there is the past (15 years ago) and just went through this again with a new plane. History repeats itself, I had forgot in the years that went by and had to learn this again.

You can't argue with results, a humming bird can't fly??? Try telling him that in mid air. And a Cub will track better with toe-in!