If you know that something got posted as the start of a thread and who started the thread there is a way to find that too. Click on the person's user name, go to their profile, click on Statistics on a tool bar in the middle of the page, and then click on threads started by that person. I know that you posted a year or two ago about some mallets you made for your woodworking group so I would just look back through those threads you started until I found with with key words that matched what I can remember. Even someone who has as many posts as Stick hasn't started that many threads so I could search through those until I found something specific.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.