I noticed the tip stall on the first landing that i did. It was about 5 feet up... Lucky for me I saw it coming and was not suprised as I did have it flying a little to slow. Little bit of power and aileron and it came out good. I do think my CG is a bit far forward. It balances just a hair back at the wing tip. I will add tail weight little by little.

How do I check the thrust line check?