This subject was discussed last year on the Tech forum with some insights from shop owners and other insiders. I don't know what the capabilities of the search tool are, but you may be able to go back far enough to find the thread. I think one thing that has come out recently is Merlin's revolutionary new limbs. The concept seems awesome. Ask Pinwheel12 or Len in Maryland about those. There are lots of folks on that forum that could give you some really good info on new products/processes.

The most important bloodtrail leads right to the foot of the cross