Update:
I’m not going to lie, I wasn’t holding out much hope on the open comb F plate. I just couldn’t see how it would be that much better than my D plate which has been leaving my pretty disappointed, but it is. I got a damn fine shave with it.
I used the same Personna Red that I tried with the C plate, so I didn’t expect any burn, but I didn’t expect this close either. I’m impressed. I’m going to hold my breath and try it again next shave. I’m very hopeful!
My first Karve plate was a D straight bar, as it was the most "aggressive" he offered at the time. After a few shaves with it, I put it in a drawer and patiently waited for him to release a more aggressive (i.e., efficient) plate. Sure enough, the F straight bar came out, and I bought one on the day of its release. It was a significant improvement on my face over the D. I then bought the F open comb plate on the day of its release, and I'm very happy with it as my go-to Karve plate.
When the G comes out, I'm sure I'll try that one too.