Great product to compliment your AD20 especially if you have custom goats on your blade! The factory bearing were definitely sufficient but skiffs always feel a little more solid and slightly smoother action. Since I was taking my knife apart to install my goats might as well give the bearings an update while I’m at it! Great price, great quality and who doesn’t like playing legos with their knife? The AD20 is already a beast unmodded, now it’s an absolute tank!