Rock Master Publications:
Sublime Climbs - A Guide to the best rock climbing venues in Victoria, Australia.By Kevin Lindorff, Josef Goding & Jarrod Hodgson. Over 700 climbs, 158 phototopos, 36 maps, and 380 pages covering the best of Mt Arapiles, Mt Buffalo and the Grampians $45.00
I vaguely remember discussing it with Steve (of Rockhardware) at some stage in the not so distant past while standing in the pines. They weren't happy with the threaded bolts on Thin Edge of the Wedgie among others and were discussing replacing them. I do not know if they have got around to doing anything but that's the first place I'd check.