I kind of disregarded there invitation to send it to them because the color cup still holds paint and I wanted to finish my model!
Problem is, I gently dropped the brush into a jar of lacquer thinner with the tip off because I had another Model Master Gray incident where it got paint in the inner workings, and it bent the little brass tip which the needle goes through. So I have to pay another $15 for a new head assembly. Then I can send it in..