I play with the Tour and I really enjoy it. The SW is 225 and, like you, can't really do SW in the 330s. I've tried a few times and it wears on my shoulder, even with a shadow swing.
The issue with the tour for me is that despite the right SW, the 100 size head drags a bit, especially when I hit a one-handed backhand. My Clash 98 is actually heavier but more headlight and easier to use on the backhand side. But that's literally the only drawback on the Tour.
I did play around with adding putty to the handle to tail-weight it a bit and bring the HL up to about 6 points. Currently at 4+. But it did not feel right. The Gravity line seems very intentionally designed and I suspect that it doesn't lend itself to customizing. Others on this site have talked about how when they customize the MP it totally changes the racquet, instead of simply augmenting it.
One thought to consider if you're still demo-ing (I'm alway demo-ing) is to try the TF40, which is like a more flexy Pure Strike, or the Extreme Tour, which may lend itself better to customization.