Anyone have any close ups of Susato low whistle keys and how the attach and function?
I have no pictures. The photos on the Susato site may be about the best that you will find.
Oh, Doug Tipple has offered them on his flutes.
The best I can describe things is that they are flap keys which hinge at the side with the mounting screws. The underside of the flap is covered with a foam rubber type of material. To mount the key there has to be a groove or channel milled/routed into the body of the instrument. Polymer key mounts are inserted into the groove and the flap is then screwed to the mounts. Nothing is actually screwed into the body of the whistle/recorder/flute even though it looks like that might be the case.
Enterprising individuals around here have rolled their own flap keys using pieces of plastic pipe and hobby foam. A search should uncover evidence of those efforts.
Feadoggie