Hi, Rads hull came with gearboxes, Mine did not,
The overall construction is pretty good but YOU MUST DRY RUN EVERY PART,
I have had to drill out most of the predrilled holes and the fixtures and fittings are almost all in need of work with a file or a pin vise,
The nuts, washers and screws are provided and yet I find I am sourcing most of these items from my own spares box,
The assembly instructions are on a "CD" and are pretty unhelpful, I downloaded TAMIYAS PZ4 PDF and it is very much the same hull except for the suspension and the TAMIYA PDF is much more useful,
The track tensioners that ASIATAM provide are puny devises and from previous experience not much use which is why I have tapped a thread through the track tensioner housings and fitted some better engineered examples from "AXELS", It is an easy mod and well worth doing,
The gearbox mount is a nice piece of engineering, the screws to hold it in place go in from the Bottom not the top and fitting Silicone or nylon washers to isolate the mount from the hull is a very good idea.
Don't forget before painting the hull to paint it with metal primer first.
If you have not yet got one do be aware that they only release a few each month so you have to watch their website and get your order in quickly.
Shaun.