I set up the G9s two custom settings like this:
In C1 I zoom to remove the vignetting caused by shooting with two UCL lenses and the long port. This allows me to quickly flick from and back to C1 and obtain the minimum 'wide angle' setting without having to use the camera's zoom control.
In C2 I set on minimum zoom (for use with the short port, UWL-100 and dome unit), slow syncro and IS (shoot only). I use this setting for shooting very slow sutter speeds with aperture priority. I can adjust the shutter speed with the EV control (+/- 2)
Interested to hear about your settings and why.

