BLACKBEARD
If I am not mistaken the Thunderbird has a sweeping recurve rather than a tight one. These are usually not hard to straighten the limb twist. First just unstring it and let it sit in a warm area . Sometimes they will return to lineup on their own. Not ofter, but sometimes. If that does not do it, try to twist the limb back a little past center. Do each limb by it self, one at a time. Often this will bring it back in line. If that does not work, put hot water in the bath tub and let the limb warm up. Try to twist it again. Sometimes you will have to twist and hold it twisted for a minute. Do it a little at a time so as not to over twist it.
If you are successful in gettting the twist out, string it up and see if the string settles naturally into the string groove. If just a bit out, you can twist it a bit while strung.
NOTE: Only string the bow with a bow stringer. If you don't have one, get one. More recurves are twisted by stringing with the step through method, or push-pull method than any other way. You have a great bow there, take care of it .