The limb will twist towards the weaker side. So... if you're looking down the limb from the nock end with the bow braced, and the limb is twisting to the left and the string is out of alignment also to the left, you can remove wood just from the right side of the limb. Leave the bow braced, and take some scrapes. Check for realignment, and continue until it corrects. Be careful you don't get everything else out of whack, or you don't go too far. Go easy. Sometimes it doesn't take much.
Also, if you can, get someone else to pull your bow on the tiller tree and step way over to the side and look at the bow from the side as it flexes... both sides... and you can check string alignment and prop twist this way too. Sometimes prop twist doesn't show up until full draw, and if this happens, it's not too big a deal. It really doesn't effect the bow much. If you see prop twist at brace, that's a different story, and you should fix it.
I've had some bows, especially self bows, that I could not eliminate a bit of prop twist, no matter what I did. They still shot wonderfully.
