What's the "front chainstay"? You mean the front derailleur?

If that's what you mean, then it shouldn't rub in the big ring-small cog combo at all. You'll be able to adjust it, too.

http://www.parktool.com/blog/repair-...ur-adjustments

Here's the things I look at when I do mine (which I haven't had to touch since installing it, btw) --

Mounting height -- is it close enough to the rings to keep the chain contained, yet far enough so it clears the big ring?

Angle -- is it aligned parallel to the chainrings?

Limit screws -- the low limit screw should hold the cage very close to the chain when it's in the small ring-big cog combo. The high limit screw should just barely clear the chain when it's on the big ring-small cog combo.

Cable tension -- it should be tight enough to eliminate as much play as possible in the shifter without holding the FD off of the low limit screw. A "third hand tool" helps with this a lot, but a pair of pliers (for pulling the cable) and proper use of the barrel adjuster (to fine tune the tension) will do the job fine.

When I adjust a front derailleur, I disconnect the cable before setting the height, angle, and low limit screw. Once those are good, the rest of it falls into place.