I have been asked some questions so here goes- Hi John as far as the build quality goes it is the same as the Heng longs I would say (same factory I think as it was shipped from Shantou in China) New gearboxes and different boards, I will open up the gearboxes and post some more pics.
On opening the tank the mount for the speaker was broken off weather this was the factory or post office handling is anyones guess

For a good vid of one running check out oztrucks vid
http://www.youtube.com/watch?v=4yp6JWrcbrc
Paul the tracks are all plastic but seem well made the sprockets seem to be Heng long type fittings so will not fit Tamiya without modifying them also the centre screw seems quite narrow in diameter (havent got a heng long gearbox to hand to see if it fits will dig one out tomorrow)

Right I'm off to pull it apart some more
Cheers Ian