I hadn't thought of taking anything back to the past but not a bad idea...
I'll just tweak the flux capacitor a little bit...
How about a CF install of 3.9?
Show that to Commodore and get them to reverse engineer the CF, patent it ,include it in the miggys and fund themselves!
Problem is that I musn't be succesful in getting Commodore to listen to me otherwise we would today already have Commodore developed CF cards ?
As for bringing something back to the future with me, I'd bring back a US layout CDTV keyboard!