Here is a review of a similar sized clip-on with built in armrests:
http://roadcyclinguk.com/news/deda-c...irst-ride.html

I've been thinking about mini areobars for a flat bar road bike, to create more hand positions and a more aero "tuck" for headwinds. I currently have Origin 8 long ski bend bar ends mounted almost flat to make pseudo bullhorns. They provide a couple of extra hand positions, but are too wide for sustained riding in a somewhat aero position.

I'm leaning toward a "loop" style clip-on - maybe the Profile Century. I've used a stationary spin bike with a one piece bullhorn, aero loop bar and it was by far the the most comfortable stationery I've ever used..thinking this should translate to my road (fitness) bike.