[tbworld]

I do not really have an answer for you, but I can fill in some blanks. The reputation table only stores the ID of the post where the reputation was given. So you need to query the post table with that ID to obtain the thread id. From there you could create a link and redirect to the users thread. Thankfully, you do not have to query the thread table since you already know the forum ID. I am guessing your one thread per user is in a unique forum.

Another approach although more evasive is to add "thread id" to the reputation table. Thus simplifying the recall of the data later.

I do not know if it helps at all, at least it's feedback.