Now that the new 'bookworm' release of Raspberry Pi OS is released, I'm wondering if anyone has tested it on the Interceptor board. Any issues we should expect?

Over on https://www.axzez.com/forum/interceptor-carrier-board/40-pin-ffc-gpio (topic is closed or I'd reply there), I see that the FFC connectors expose I2C and some GPIO pins. I'd be interested in using them for some uses other than network interfaces. Could someone (@Bill Nagel perhaps?) post the pinout? Thank you!

I'm wondering if there is a way to put the CM4 into usbboot mode so I can update the bootloader and change the boot config on my CM4. From what I understand, this is usually done using the CM4 I/O board, by putting a jumper across some pins and connecting it to a computer over USB. However, I don't see anything similar on the Interceptor board. Is this possible to do, or will I have to purchase a CM4 I/O board in order to do this?