More detail in the CAD

My dad has got really serious with the CAD, and it has helped a lot in spotting issues I had not seen.

Blower and windchest fitted to the frame. Bellows not modelled yet.

Keys and windchest in position

Keys. Each one is hinged using a brass strip at the far end. (one shown) Slots for pins to control left and right movement.

Duct from the bellows box to the windchest. Duct is sealed against the boxes with a foam rubber gasket and screws.