Re: PS and Optimus, yes Scott installed the Graf holders for me. I've been on Grafs for a long time, and I own 4 pairs of the Velocity Step steel (272) that I had custom profiled and I do sharpen by mail with noicing. I also like the ease at which I can change out the steel on the cobra holders, so I had to wait a little longer, but Scott was able to get the holder installed for me. Test drive tomorrow, excited to see how they feel. Crazy light. I told the mailman they were a pair of skates in the box, he didn't believe me...