seen this i know a few of you have had this done?
Some companies offer a service fitting quick fill adaptors to buddy bottles, these are tapped into the base of the bottle. On no account have this type of work undertaken, or purchase a bottle that has been modified in this way as it will substantially weaken the bottle making it potentially lethal and invalidate any guarantee.
I think that it depends how it is done, and who does it I know there are brisk opinions on both sides of the fence, but I can Tell you 2 things. I would never have a Rapid without one, and never have anyone do the work but Allen Zasadny. I Have 4 Rapids and have had them a long time, they all have the Quick Fill Adapter and I have NEVER !!!
had a problem.
Just my .02 cents on the subject.