Compare the cost of getting different limbs for an ILF riser with buying a lower weight bow, such as Samick, PSE, etc., either new or used. You might be better off buying one or more lightweight bows as you rehab. I took a friend of mine through this program after his bypass surgery. Fortunately I have a number of lightweight bows since I teach classes and have grandchildren. I started him on a 15# bow, then went to 25#, 35# at bi-weekly intervals. First I had him just draw the 15# bow part way without shooting it, both right and left handed. A few weeks ago he cut down a dying oak tree for me in my backyard and hauled away the wood, so his rehab program must be coming along pretty well! Even without the classes, I’ve always found uses for lightweight bows when guests want to shoot.