Question on adding custom entries

[void4ever]

First off thank you for this, I've got it up and running and already within 10 minutes it's blocked around 200 requests.

I had a quick question as the doc was just a tad unclear (to me). Along with this auto refreshing list of IPs, If I want to add my own custom list of IPs can I do that with the command mentioned under the "Usage" section?
sudo ipset add ufw-blocklist-ipsum a.b.c.d

The reason for my confusion is the way it's worded, it sounds like that command is only used for testing after doing a flush-all and once your testing is finished you'd restore the blocklist.

If I add manual entries using that command, will they stay, or would they be wiped when the cron grabbed the updated list once a day?

Would it be better to read in my own custom list using ufw's commands, something like:
while read line; do sudo ufw deny from $line; done < custom_block_list.txt

Void4ever