I just sent backlknhuntress' Challenger back to Parker Bows for the "Grow Up With Parker Upgrade". She had the 40# limbs and we upgraded to 50# limbs. She basically got a new bow except for the cam and wheel. Parker didn't have limbs to match the old superflage camo pattern so they gave us a new riser to match the new Mossy Oak Breakup limbs. New grip came on the new riser along with a new cable slider. I had them put on a new string as well. $50 for the limb upgrade and $22 for the string. Basically a new bow for $72.00 complete. Parker was also a nice company to work with. Check out their bows they are pretty nice and affordable too.