Interested with someone who uses thermal imaging cameras to pickup things you can't see with the naked eye...
To be honest, we didn't bother - my best mate is a retired builder, who only ever worked on multi million dollar builds, and he's been happy with Metricons build quality.
Group 4 picked up a few things he didn't think necessary, so they're pretty thorough. I would be most concerned about finishing (painting, tiling, etc)
Gee thats pretty gutsy, i've got a pretty good eye and attention for detail and have done a few renos to know what to look out for but my main concern was with the slab construction as we are on a P class H2 soil site and getting stiffen raft slab, also the framing.
Aside from the display homes, we have actually gone through a couple of KDR done by M in the local area which are close to handover and the finishing and quality looks pretty good, consistent with the Signature display homes.