Astra SP gave me a bit of burn from the very beginning so I stopped using it in OCV2. Personna (ISR) was great and didn't gave me any burn, but I had to be very careful as I could cut myself quite easily. Now I'm using either Voskhod (no more than three times) or Personna (USA) (four times). Both of them are fine for me in OCV2.
Comparing with closed combs: I can get at least 4 or 5 with Voskhod and at least 5 or 6 with Personna (USA).
Maggard OCV2 Users