AXA goes up to 0.5" tooling. That's plenty big enough for the 10" lathes. And norman's right, the rigidity is an issue with the 2 bolt tool post (4 bolts would be better – there's a mod for that). So a bigger tool holder wouldn't help. Height would also be a problem because even with my AXA tool holders I have to bottom them out to use a 1/2" tool. And some already don't go low enough for .500 tooling (they need .02 ground off the bottom to sit low enough). I think you'd just have trouble with the larger tooling.

I don't have any info on it because I haven't done it myself. I also tried to google it and I'm having trouble finding it. Perhaps it wasn't a G0602 that I saw with this fix, but another similar lathe? I can't remember. If anyone else can find the link(s) please share them.

But basically the tool post assembly is held down with two bolts. The ones you loosen to adjust the angle of your cross slide. The idea is to improve this by using 4 bolts instead of 2 – thus adding to the tool post/cross slide rigidity. You have to make a larger plate (bored out to the same diameter as the original clamping ring that you're replacing).

The only bummer is you actually have to drill and tap the cast iron cross slide saddle. It's not that drilling or tapping cast iron is hard, I'm just always reluctant to add holes to my machinery. I like to keep things original. But I doubt the G0602 will ever be a collectors item, so I'm not sure what I'm worried about.

I have a fair amount of flex in my cross slide, even with all the gibs properly tightened. It's lessened a lot if I limit the amount of tool overhang, but I'd guess the tip of the tool flexes downward 0.005 or so during heavy cuts. That's why I always take light "spring passes" once I get close to the final size. 

I'd like to add to the rigidity of my setup, but I'm hesitant to modify (drill/tap holes) my lathe. So I'll probably just continue to live with the flex. I can still get excellent results (to within .001 or better of desired size) by being patient. It's when I'm in a hurry that flex seems to become a problem.