I had a Christmas wishlist item fulfilled this year in the form of a Powersmith Ash Vac. Really happy with the vac so far, better suction, and quieter than my little shop vac that I was using and also serves as a nice space heater while the stove is down for cleaning. 
As I went to perform my periodic flue cleanout with the Linteater I discovered that the provided adapter for the vacuum cap was still too big for the Powersmith. Fortunately the recycling bin yielded something perfect in the form of the neck off a bottle of Airborne Gummy vitamins: (broken link removed to http://amzn.com/B00CMKE9GC) Though I'd guess other vitamin type bottles could be found in the same size.
Cut the top off and the threaded end fits closely in the existing adapter, a little hot glue holds in place and seals it up. The black collar on the Powersmith hose is a very tight friction fit inside the bottle neck. Here's some pics and hopefully it helps anyone else who might face this situation.
![[Hearth.com] Linteater adapter for Powersmith vac [Hearth.com] Linteater adapter for Powersmith vac](https://www.hearth.com/talk/data/attachments/149/149052-255e90fe9ba0cea3628f149686a3029e.jpg?hash=CA3nBSMvQc)

As I went to perform my periodic flue cleanout with the Linteater I discovered that the provided adapter for the vacuum cap was still too big for the Powersmith. Fortunately the recycling bin yielded something perfect in the form of the neck off a bottle of Airborne Gummy vitamins: (broken link removed to http://amzn.com/B00CMKE9GC) Though I'd guess other vitamin type bottles could be found in the same size.
Cut the top off and the threaded end fits closely in the existing adapter, a little hot glue holds in place and seals it up. The black collar on the Powersmith hose is a very tight friction fit inside the bottle neck. Here's some pics and hopefully it helps anyone else who might face this situation.
![[Hearth.com] Linteater adapter for Powersmith vac [Hearth.com] Linteater adapter for Powersmith vac](https://www.hearth.com/talk/data/attachments/149/149050-fa6d60d268cc63c67078473208a4a0d3.jpg?hash=ZMDrcRBFtp)
![[Hearth.com] Linteater adapter for Powersmith vac [Hearth.com] Linteater adapter for Powersmith vac](https://www.hearth.com/talk/data/attachments/149/149051-e642e1a94b0ae75f21b08614da3688bc.jpg?hash=mY-RY0r7eG)
![[Hearth.com] Linteater adapter for Powersmith vac [Hearth.com] Linteater adapter for Powersmith vac](https://www.hearth.com/talk/data/attachments/149/149052-255e90fe9ba0cea3628f149686a3029e.jpg?hash=CA3nBSMvQc)