Sorry to be a little late in replying, Julio--
Just yesterday I was in my local outdoor shop, having my more-or-less annual conversation with a guy about Keeping Hands Warm and Dry on de bike, and he was showing me what the local fat-bike riders have settled on: All variants on your solution. So, you seem to have nailed it -- well done!
"Pogies", I think they're called in these parts -- adaptations of kayakers' tools.
(They don't quite work for me, as I use drop bars on my Raven, and although there are drop-bar versions, they're for derailleur bikes, and my Rohloff shifter sits on my Thorn T-bar below my handlebars. Then again, I take my bikes off the road betw early December and late March, or until the ice is off the roads.)
Safe journeys, John
