In regard to "wiggle" on the WEPS. You can add washers to the legacy sharpener to remove the wiggle.. Contact Bob at Oldawan. Also, new updated "ball bearing" arms are available either direct from Clay, or Bob.
Confused about what knife we are talking about. My Masamoto VG Gyuto is Hyper-Molybnenum-Vanadium Stainless. The HS series is Pure White High Carbon Steel. This is a much more expensive knife than the VG.
Since this discussion started I've ordered another Masamoto Gyuto, this time a 180mm HC which is described as "Virgin Carbon Steel". Less expensive than the HS but should give me experience with my first venture into pure carbon in a long time. Many years ago I picked up a couple of non-stainless knives at a used sale for something like $5 each. They already were pretty tarnished but took a nice edge, easy to sharpen. Don't know what happened to these. But, eager to try pure carbon steel again. Suspect I will like, won't mind them getting a bit tarnished, or rusted from time-to-time. I like sharpening, maintaining knives!