What do we really know from primary sources about Russian-manned air units in the Luftwaffe?

[Sid Guttridge]

There clearly were some minor air units manned by technically Soviet citizens for the Luftwaffe.

However, what do we actually know about the composition of Russian-manned air units?

I can only find internet references to such units, most apparently going back to something entitled, "Luftwaffe der Streitkräfte der Völker Rußlands ROA", which claims a mini airforce of some eight squadrons embracing all arms of service including fighters, bombers, reconnaissance aircraft and transports and even a single Me262 jet fighter! Yet it appears to entirely lack sourcing.

Is this largely urban myth?

What do we actually know from primary sources about such claimed Russian-manned units, if anything?

Many thanks,

Sid