Awesome rifle, but one thing struck me, I might not have the biggest set of hands so the vertical grip on it was a little to large in girth. Might fit my wife better, she can handle the size...
I agree with you - if you tend to wrap your thumb around the stock, it feels big. Generally I keep my thumb on the same side of the gun as the rest of my hand, and shot that way, the TRG feels fine.