[yogybär]

henchman, for your understanding:
Bf190G-6 = 2x13mm + 1x20mm weapons
Bf109G-6/U4 = 2x13mm + 1x30mm weapons

as it is possible to read in the pdf (page 7 & 8), it was possible to load 1x250kg bomb or 4x50kg... or the 300l tank.
Foreach of these 3 alternative external loadouts, a different Rüstsatz was needed. The same is valid for the gondolas.

Rüstsätze could be mounted ad removed within a short time. From what I read about them, it was ca.1 hour, maybe 2 for the gondolas.