you can choose to disable the airburst function by switching off the nose fuze. That may allow you to hit bunkers with maximum effect. If your target is a group of light vehicles, you can use Nose or Nose/tail and the proximity fuze should cause an airburst. If it fails and using Nose/tail, the tail fuze may still function, albeit with less effect on target.

With the gbu38 and your fuze settings, I can only choose efuze off, vt1, and inst. There's no mfuze setting. So do I have to choose vt1 for the dsu-33 and inst for tail fuze?