The rule is 1 thread which you can bump once every 24 hours by adding more information (by responding to yourself).
If you start a 2nd thread, you must DELETE the 1st thread not CLOSE it.
Closing a thread (which I do) hinders anyone from responding to my post (therefore bumping me up unintentionally).
Closed threads will still have the same exposure as an open thread therefore you are able to open it to add updated information by responding to yourself and bumping up to the top of the list.