Great write-ups, thanks for all the effort into doing all these! Would like to add to keeping a hold of the nuts when taking off the idler arm, and this works when dealing with any nut or bolt you don't want to lose, to install a piece of electrical tape inside/across the socket first. Sticky side of the tape into the socket/onto its outer edges, its the thickness and conformability of the tape that will make it hold the nut or bolt head into the socket. Still have to be careful not to jiggle, or bump the nut/bolt out of the socket. Works when putting a nut or bolt in as well as taking it out.
Thanks Again Ian.