Interesting that you say this since you seem to have good shaves with the Feather, which is often viewed as the sharpest blade out there, but as always YMMVThe mailman brought me a package today. The blades I ordered arrived and so I got myself a shave.
Preshave proraso white
Soap TOBS cedarwood
Post shave Nivea sensitive balm
Razor r89 with personna lab blue (yes I was able to find them!)
3 passes wtg xtg atg
Result : dfs with some ccs spots. some weepers during shaving but nothing cold water or the alum stone didn't sort out. Enough discomfort to make me complain but nothing serious.
The blade is very, very sharp. It cuts through everything with almost no resistance which makes it a really smooth blade. However do to poor technique and maybe some nonchalance, the shave was both less comfortable and close as I believe is possible.
I will use this blade again but it might be a bit too punishing for my current skill level.