R.A.W. Carbon fiber buddy bottle on a BSA R-10 MK2

Has anyone installed a Rapid Air Weapons carbon fiber buddy bottle, https://www.rapidairweapons.com/xcart/product.php?productid=17733&cat=255&page=1, on a BSA R-10 MK2? I saw a post a few months back on a different forum of a guy that did this but, can't find it again. I've talked to RAW and Martin says that some people have told him it works and some people have told him it does not. In the post I originally read, the gentleman said all he had to do was open up the inside of the stock to accept the larger diameter bottle. The bottle screwed right into the action with not modifications or problems.

Any input on this would be greatly appreciated.

Craig