The Arch Wiki recommends 100MiB so you don't need to sacrifice too much space https://wiki.archlinux.org/title/RAID#Partition_the_devices
Great to meet you and it seems like the community is in good hands. Thanks for the work you're doing!
I do agree FUTO voice is certainly good, the only thing I've found that can understand my Scottish accent.
Syncthing for everything: file transfers, backing up phone photos, synced obsidian vaults, etc.