Hi Michael, I have a lot of fun with the Unaccompanied Django, I learned the Improvisation 3, second Part, and work on the 5 now. At the same time, I keep practising the Gypsy Picking excercises and am convinced, as you say, that this technique is very effective. However:
In Improvisation 5, measure 23 (and many similar situations) - is it really better to play the 4th note with a downstroke? I practise it very patiently, but have yet to discover the sense it probably makes, other than there's this rule about downstroke on a new string.
In measure 25 you downstroke 2 fast consecutive notes on one string - why?