Both those rubbers work really well on BH, but what I like more abt D05 is the blocking and durability. So Id stick to D05 if you want to save money.
If you boost H3N, I say 40 or 41 deg otherwise use 39 for easier activation of power
If you boost H3N, I say 40 or 41 deg otherwise use 39 for easier activation of power
I also have same set up FZD with H3N bs 39, I’m also considering trying 40 degrees if u can shed if any difference