I've been using these scripts in one way or another for over a year now and recently decided to Github them. The master branch has links to sample images you can download and all the other branches house the scripts, files and other bits.
Since i usually run my Pis and other boards headless, that's how the scripts are set to build and what the images provided are. Running 'sudo tasksel' can just as easily get you a desktop on a Pi4/3B+ if that's your needs.
Well, just thought I'd share and I hope someone finds them useful. ~Cheers
aarch64 / armv7l / armv6l