Thanks for the photo!
1. is missing and someone put a screw arrangement that is going to damage the extension over time. I would like to know whats in there so i can find something good to improvise with.
2. they removed the inner brass friction piece and put some big aluminum piece instead. I guess they were trying to increase the amount of tilt. I guess I can live with it but it looks gastly.
3. I would like to chisel these out and put a full GG in. Many people like to use the entire surface of the GG and you can deaal with trapped air simply by lifting the back a bit when you compress it.
wfwhitaker, who did your bellows for you?