I seem to remember folks making alot of good suggestions on the last thread you started on this, did you cover all the bases suggeted? Hearing a realy click doesnt mean alot. It could be a different relay than the starter relay, and if it is the starter relay, all that means is the exciter circuit is working.
Relays can fail on heat soak as well, they close but will have burned contacts that prevent power from flowing through it. usualy a sharp tap on the top of the relay will bring it to life.
Also, just to make sure we are on the same page, when you say 10mm bolt on the starter, do you mean the 10mm wrench size nut that the small wire attaches too (this is a 6mm stud)?