I did about 50 miles with the full sample unit installed yesterday but without fluid inside the main section - just the bottle on top with the cage - so 20 oz on top (just wanted to make sure it attaches correctly and is solid) and about 40 miles today with the short course system (29 oz filled - plus computer) no top cage or bottle.
I will need to move the straw back. The sample has the straw too far forward.
The bike is faster with the main section installed - it does a fantastic job cleaning up air that turbulates up, under and through the arms in an open system or a normal BTA system.
Today I used it without the top cage and with my Garmin mounted on the "T" section. So - 29 oz plus computer and I could not notice any issues with 29 oz from a weight or sloshing perspective.
I'll do some miles Tuesday with the full system filled 29 oz + 20 oz.
Dan Kennison
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http://www.PremierBike.com http://www.PositionOneSports.com