That's great news Larry. I've ditched the 3/8 now and started using the 1/2". (3tpi) I find it seems to retain its teeth edges longer, its quite a lot more stable (beam strength) which helps counter the tendency to drift in dense or very thick stock and yet it's easily small enough to do tight enough radii for bowl blanks. I'm really getting on with the 1/2".
I bought 2 x 1" 1.3tpi's from Tuffsaws too. For fast ripping of really thick log material, they are absolute animals. They need thick stock though so not a versatile choice...very much for the big green logs and nothing else.