MTK supplies flat strips of aluminium sheet (without the folded edges) for the chassis, which are totally useless.
I made my own chassis using 1mm and 0.5mm thick plasticard, with the MTK undergibbons cleaned up and glued in place.
The MJT bogies have still not arrived so I used modified Hornby 2-BIL bogies (obtained as spares from eBay some time back) with 14mm wheels. I know they are not the correct type but they look very close. They were fixed with 8BA bolts and nuts.
Cheers
Darius