BR MMB Milk Tank Wagon TSV

This is an N-gauge / 2mmFS model of a British Rail / Milk Marketing Board 15' wheelbase vacuum-braked 4-wheeled tank wagon. There was only one exactly like this, apparently, number 42865, and while its TOPS code was TSV the code it carried was TRV (see British Railway Wagons, Railtanks, Compiled by G. Gamble, Cheona Publications).  The model is designed to fit onto a Peco 15' wheelbase steel solebar chassis, assembled without using the metal weight (add something suitable inside the hollow tank instead) and with the large flanges removed from the coupling retainers. There are pegs under the tank to fit through the holes in the chassis, and once in place, the larger ones have holes through them which can be threaded with short bits of 0.4 mm wire or similar to keep the tank in place on the chassis. The alternative is to glue here, but be certain to assemble the couplers on the chassis before you do that, or the tap will get in the way. The 3D print comes with a left and right pair of vacuum cylinders which are designed to seat one each side of the wagon, both at the same end, across the second of the three transverse ribs on the underside of the chassis, counting from the one closest to the middle of the wagon. The the V-hangers are closer to the middle of the wagon than the cylinders, which nestle just inside the solebars. 
The ladders have some additional supports joining them to the body of the tank in the middle, to add strength during manufacture and shipping. The intention is to remove these with a sharp scalpel before painting.  
For sale when I have tried one to make sure it works, or earlier if you ask me.
When fitting the tank to the chassis, fit it the way round which places the ladder the opposite side of the centreline from the vacuum cylinders. You may wish to add a couple of extra ladder  steps (e.g. cut from Ratio brass laddering) on and below the solebars, lined up below the ladders on the tank.