Been trying to do this myself. Since a road bike is more stretched out than a tri bike, I'd think a clipon that let u extent the elbows' pad position behind the main bar would be desirable, not too far as to interfere with out-of-saddle position.
I bought a pair of Profile T2+ too, 'coz they are affordable, looks sharp and adjustable as described. Last week on my first time out with it, I had it too close together 'coz I needed to clamp them down on the meaty part of my 26mm bar, that proved to be uncomfortable. Today, I was successful pulled them apart by about 1.2" and see how it goes my next ride.
Still dunno though, feels like when in aero position needs to have an bar end shifter, and that's just too much work and $ for the conversion of my 15 yrs old bike. Will see.