The Chaconne is only difficult in a few places, actually, I have played and broadcast it live; the main challenge, in my opinion, is the length. It seems that taking 2 or 4 or even 8 bars at a time would be a very interesting study. You'll find the first 8-bar statement to be fairly easy and very satisfying once you have a handle on it. While the violin version is cool, the Segovia version is one of his best transcriptions, with bits from Busoni, and some really good fingerings to help you along. However, also working on some shorter, more manageable pieces will actually give you something to perform in much less time.
Lester Devoe Flamenco Negra
Lester Devoe Flamenco Blanca
Aparicio Flamenco Blanca with RMC pickup
Bartolex 7-string with RMC pickup
Giannini 7-string with Shadow pickup
Sal Pace 7-string archtop