Generally I don't have plane specific convergence settings, with a few notable exceptions. A .50 cal is a .50 cal, and as convergence doesn't only influence the horizontal spread but also the vertical trajectory, I don't like having to remember different mental sight pictures for the same weapon in different planes.
So the basic line for me is having ALL weapons in all planes set to D350, ever since my early days in AH back in 2005.
Exceptions: Hurri I & II with the MG option and Spitfire I, those calibers don't work at range anyway, so I have set them at D200. ME 262: one pair at D600, the other at D200 (or was it 250?) for a maximum shotgun effect.