I am retiring my 03 60-70 lb cam.5 xt 2000 target ultratec this winter for an elite. My question is what do I need to get ahold of to convert this bow to 40-50 lb for my wife. Is it just a simple limb change or will I have to go with cams/string and cabels? She has the same draw lenght as I do or within an 1/2 ". Thanks