Experience with burnishing lifter bores?

How much was it. You have me thinking now. When I tube a block I have to peen the tubing so the lifter will go in. Even after I peen it I have to gently relieve and high spots with a carbide burr. Now you have me wondering if I could use this tool. Hmmmm
It worked a treat on the factory bores. Are the tubes thin like the original bores are? I know you know, but for anybody else there's a photo up there ^^^ that shows the original bore is paper-thin.

All this thing does is make the bores round again, it doesn't remove any material. Actually, it can't. It's smooth as a baby's butt.