Definitely sold on the FBV sharpening.  I haven't noticed the glide as much as the extra bite.  Went with the 100/75 and could really rip ruts in the ice with out getting any chattering or slipping.  Also, I almost felt more stable on the ice, but it might just be the extra trips to the gym finally catching up.    I am around 200# but am using 296mm steel at an 11' radius.  I used to always go with the 1/2" hollow because anything smaller and I would catch edges particularly on transitions.  I would have to get them sharpened every 4 or 5 skates, so I am hoping to get more from the FBV.  They did charge a premium and it was an extra 20 min drive so I don't know if I will stay with it.   Speaking as a beer-leaguer, I know a few on my team that would go out of their way for it, but if I posted on the "league" forum a bunch would follow.  No use in feeding the competition.