As said earlier the Ness edition is a scholarly edition. Pieces sometimes have variant readings - from different sources - for passages. This is hugely important to to be aware of, but doesn't make the music straightforwardly playable .
Are you researching Francesco or looking for pieces to play? The Lute Society (in Britain) have been issuing Francesco pieces with their Lute News. You could join that. And there's: http://www.cs.dartmouth.edu/~wbc/tab-serv/tab-serv.cgi?F_da_Milano -- To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
