WTB - XLab cervelo sonic wing

I also have a P2C and I'm looking at options for this. It seems that the XLab might be the only option, but it's not exactly cheap. The sonic wing is about $50, and each of the bottle cages is about $50. Finally, you'd need either a bag ($30) to stuff all your tubes, CO2, etc. in. Or you can skip the bag and get the nut that lets you screw in your CO2 to the sonic wing.A buddy of mine (serious triathlete) recommends spending the money for the XLab cages, since they supposedly keep bottles from popping out when you hit a bump. Has anyone else had any problems with this?https://www.nytro.com/category.cfm/shop/Bike-Hydration/brand/XLabI can't personally vouch for this - I'm in your shoes and just doing some research. Let me know what you think.Justin

Well I have a P2 with the wing and just put plastic specialized cages on it (LBS guys said they worked fine...) and I've had NO problem with it launching bottles---I only use the wing for training and actually take it off to race.  I didn't bother with a bag, etc---carried tubes, co2 in jersey pockets....