I honestly cannot remember what size through bolts we used. I suspect 10mm long Raumer or the standard Petzl ones, but I cannot be 100% certain 7 years later. Everything we placed is stainless, so if you see rusty anchors they are the originals and worth avoiding! As far as I know, all hangers are in place. The mine gets fairly regular traffic from BSCC and the like, and they would have told me if the hangers had been pinched. Take a handful of 10/12mm hangers and nuts if you want to be sure, but I doubt you'll have any problems.
All 4 anchors on the entrance level are resin fixed Petzl Collinox. The rest below that level are expansions.