Ok, inching slowly forward, I've gotten to the stage where I need to build the kernel. However, again the instructions don't match with what I have.
The instructions on building a kernel say
But there is no directory "debian" among the material I've cloned/checked out using git.
fakeroot debian/rules clean
fakeroot debian/rules binary-headers binary-generic
Nor is there a 'debian' in any of the subdirectories. Running "find" doesn't show any files named "rules" either.
arch debian.master fs Kconfig mm scripts usr
block Documentation include kernel net security virt
COPYING drivers init lib README sound
CREDITS dropped.txt ipc MAINTAINERS REPORTING-BUGS tools
crypto firmware Kbuild Makefile samples ubuntu
My own notes are not much better, it being 10 years since I last had to make a custom kernel.