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I don't have the time nor inclination to deal with on-bike stuff. I want someone who knows what works and can suggest stuff to test quickly and get it done with minimal external variables. If I bought one of the on-bike units I'd just be fucking around with it and get nowhere.
I have the original Shiv extensions plugged into the original TriRig base bar. They're setup quite close and long which is probably going to cause me problems having been off the bike for 2.5 years but we'll see. The extensions don't follow my arm like these new-fnagled ones so there's some gap filling that could be done. Plus, I still want to see if a higher body position with my arms pulled closer to my body (ie. not as stretched out) and my hands closer to my chin is any better than my hippysuperman position.
I have Vuka Evo on the Mason but I want fast not comfortable. I've ridden 24hrs with the S-bends and mechanical so with Di2 I can deal with most setups.
hippy-
I want someone who knows what works and can suggest stuff to test quickly and get it done with minimal external variables.
Do wind tunnel sessions do that though? Dowsett's recent video series seemed to suggest that they simply follow the test protocol you want run, operate the machine, and provide you with the results.
It was implied that it's up to you to decide if you want to go higher in the stack, lower, longer, shorter etc... they just provide you with the numbers/graphs and tell you it's quicker or slower. And moreover, it's up to you (or your mechanic) to make those changes to the bike... eating into testing time.
Xav from Aerocoach discussed this on a podcast recently and said exactly the same thing. He can't make suggestions on position or geometry, because he'd be using information gathered and paid for by other riders in his wind tunnel... it wouldn't be fair.
Phil44
It seems like there are a few on-bike aero testing solutions either recently released or soon to be released. Might be easier than throwing money at a wind tunnel.
I personally have found the inwards angled extensions like the Vuka EVO or Profile ASC more comfortable than the straight ones, but that's probably more a case of me not being able to tuck my elbows in narrow enough.