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Editing is possible, yeah. Deleting, you should be able to delete threads if you were the only person who posted.
… Which I may have just ruined by posting.
Edit: There’s a little pencil icon on the list of blue buttons at the bottom of any of your posts. That’s how you edit. There’s a trash can icon too which can be used for deleting.
Thanks.
Apparently had a script blocker affecting the page and wouldn’t let those buttons load. My fault, but hopefully this helps someone in the future.