Hello Jon,
Excellent idea for a T16 "bathtub". My choice would be to replicate the
Model 1936 "Dutchman", as built for and used by the Netherlands East Indies Army. These saw combat in 1941 and some of them were later captured and put to use by the Japanese Army.
Apart from being a personal choice, I think this type of turret would be easier to replicate as it is made of flat plate. Also I would use the cletrack steering of the T16, as far as I know the Vickers had the same with tiller steering. The steering wheel with track warping system was typical for the Universal Carriers.
Search for Vickers Dutchman on this forum to find more information on these interesting little tanks.
HTH,
Hanno