Pleasure to be using rclone sync, wonderful tool.
I've been fiddling with
--filter-from to reach exactly wht I want, and was suprised to find out it wouldn't purge empty folders, only treating files
rclone sync /xxx /xxx --filter-from syncconfig1.txt
# syncconfig1 file content + /A/** + /B/** + /C/** - *
Turns out a removed folder from one of the source folders included in the conf file ends up in the destination as an empty folder...
I'm sure it's been covered before, having though searched through the forum and thoroughly read https://rclone.org/filtering/#include-from-read-include-patterns-from-file
Many thanks for your help.