That is super kind of you!

I'm not sure which clients. I haven't installed opencloud, because I didn't see any clients for it on a cursory look. I tried nextcloud, but it kept failing after updates, so now I just use cron jobs to automate manual backup scripts I wrote to an external HDD. If you do test any desktop OC clients and find any "good enough" ones, I'll start with it : ) and if you don't get to test any, know that I still truly appreciate your offer!