I had some overlays added to my PMA after accidentally blowing out a limb on it earlier this year. At a 31" draw, there is a lot of stress on a recurve limb, so when I got some 69# limbs to replace the 62# ones I blew out, I asked the Widow bows to strengthen the tips by adding overlays. They did it, it looks great, and I haven't had nary a problem.
By the way, the limb blew out because I accidentally dry-fired it when the nock pulled off the string while drawing, and I didn't realize it. Black Widow didn't do the overlays for free, but I'm almost sure they had tears in their eyes as I talked to them on the phone about my hard luck...