I found myself reading an article about Adriana Breukink yesterday. I knew her only as the maker of the world's largest recorder - I didn't realise she is keen on improving the recorder. I have never looked closely at the Adri's Dream recorder, but I see on the tenor, which has keys for the bottom notes, that both C and C# look as if they have "proper" holes. I have 3 tenors that have keys, but they all more-or-less replicate the double finger hole of a keyless instrument: the Moeck and the Yamaha both have a single hole that is only partially closed by the C# key; the Aulos has separate holes but they are small and close together. All three have a pretty poor C# (as I grumbled about several posts ago).
Has anyone tried the Dream? If so, does it have a better C#? It looks as if it should, and that seems like quite a good plan to me: if you're having keys anyway to enable the hole(s) to be placed out of reach, why not locate them in a good position rather than one essentially dictated by the requirements of a keyless instrument?
There is no information on her website about the Dream, so I presume she doesn't make them herself any more. Her Eagle also has keys and what look like decently proportioned lower holes, and she does claim a good F# for the alto. Mollenhauer's Modern and Helder models also have them, though these and the Eagle are all much more expensive than the Dreams. Not that I ever get the chance anyway, but I presume the days of being able to try out wind instruments are unfortunately over for the foreseeable future.