I have a 7-speed cyclocross-like bike made by Kona. I'm getting a new 9-speed cassette and bar-end shifters. It currently has Sora everything and a Tiagra rear derailleur.
Here is my plan:
I'm going to remove the drop handlebars and the brifters. In it's place I will put time trial base bar, pursuit bar, or bullhorn bar (whatever you want to call it).
The brake levers will be inserted into the bar-end.
I'd use bar-end shifters, but I'd attach them with Paul's thumbies. Here my question though. I'm thinking of attaching them so that they face down towards my hands. Seems like that's where your thumbs are anyway. Here is a crapulous picture of my idea.
If you know of any reason why this would not work, please let me know. The only thing I can think of is that the shifters would get in the way of my brakes. But perhaps the levers are long enough?
Or if you have any suggestions please let me know.