Hello BC.
There's a little wire on the back of the monitor with three little pins sticking up, if you move from one pin to the next I think it moves the horizontal position. I'm pretty sure that's on a G07, I don't have one here in front of me to tell for sure. Also your Horizontal Hold or Horizontal linearity or whatever they call it on that chassis will adjust not only that curl but also the position on the screen sometimes.
Depending on the type of curl too, I just recently heard (and I think it helped one of mine) that the two 'bridge' caps that are connected in parallel near the flyback (C518 and C517 maybe?) can help... they're 100uf and 220uf, somebody said if you put 220uf and 220uf it makes the screen more geometrically square, I tried it on one that was way off and I think it did help it a bit. So you might consider that. Google the two I'm talking about, they're right near the flyback and connected in parallel.