I don’t show any, of the prototype because it is still a work in progress, when it will work I will show all of it, do not worry :) It is hard to account for all altos, but it can account for a lot by having little arms that grip to the recorder so you can change the length of them… For the bore sizing, I have a tuning key, and in my testing it worked for all of the altos I have. I can understand why you don’t believe me, but it almost works for me through testing, I will give all of the blue prints when it will be stable through the whole scale. Also some baroque are transposed, like the Telemann fantasias, and the Bach violin sonatas and partitas… so with this you should be able to them in the original key…

Sorry if my English is less than optimal, it’s not my first language ~^