Well now that we have proof, what should we do next?

Jager,I've looked into this b4,it appears that several,maybe 5 or 6 were built with 20 mm hub guns and this was only because of a shortage of Mk108's.That said all K4 came with mountings for the 20 mm gondolas and yes JG26 were disappointed to see their new K's come in with the 20's under wing.Most if not all these planes had the gondolas removed as the unit prefered the agility of the plane W/O the gunpods over the extra firepower.
Whether or not the gondolas were ever used in combat seems difficult to find out,that said the plane was built to carry them.