Thanks, trtaylor.
Yes, it is subtle mostly. The spinners are quite new as I have 5 of them and use them occasionally. And bought the machine less than a year ago.
Tri-lie felt pad is also clean and I use Tef-Top puck. As for the wheels my favourite is ruby. Pink is to "gentle" and orange is too "rough"-))). But closer to the end the wheel lifespan "waveringness" gets worse...
Again, with the last pass you go against the rotation then? So, different direction to the sharpening process? Hmm... need to try this...
Yea, I guess it is a combination of different issues and go out with the experience...