I Make a late Baroque flute after Rottenburgh and Grenser.
It has an adjustable register and cork so that it will work well
with a variety of pitches and embouchures.
I have recently started to make a flute after Grenser
in blackwood or boxwood, also with a register and screw cork.
The sound is bigger, and the top notes seem easier to play in
tune. I do not have an image of it at the moment. The price is
the same as the Rottenburgh.