Sorry it took me a bit, but I found a few bugs:
msgID: 200 gives https://loyce.club/archive/oldposts/0/0xx.html#msg200 instead of https://loyce.club/archive/oldposts/0/2xx.html#msg200
topicID: 10 gives https://loyce.club/archive/topics/10/10.html instead of https://loyce.club/archive/topics/0/10.html

The topicIDs and userIDs will work much better if I process all data I have. I should have time to fix this in the weekend.
Todo for myself: I should make a custom 404 that contains your search box for anything under https://loyce.club/archive