If you hang around awhile, or just do a search on the BBS here, you'll find lots of arguments on HO tactics. Regardless of what view you take on using HO shots as a tactic for your fights, I'd strongly recommend you not use it if you plan to fly the Zero. Its just not durable enough. Planes like the FW or the P-47 or the F4U ........... they all have one thing in common. Big radial engine in the front, can absorb lots of damage and keep going, less likely to take a pilot wound. Zeros are small, light, lightly armed and offer almost no protection to the pilot. You let yourself get sucked into a HO move and you give up all the things that give the Zero an advantage for the chance at one shot, and that chance is weighted against you.