I was lucky enough to buy one of these kits second hand, complete with Gibson wheels, Mashima motor, Markits gearbox, 2 different sprung buffer sets, sprung horn-blocks and brass smoke box darts. Only slight downside the chassis has been started (badly) but as its a brass chassis easy to rectify.
The kit itself looks to be of an excellent quality in the etched brass construction style. The etchings are of excellent quality The boiler is turned brass, fire box and smoke box are pre rolled. Some fittings are of hard brass others are high quality softer metal. I have no idea how many of the extra fittings I have are included in the kit.
The kit was originally an Albion Models kit, and certainly would stand out on a mall layout
I see David is selling the kits for £120 and the additional parts another £67. No doubt the builder could choose other options for the motor and gear boxes, is it worth/feasible compensating the 0-4-4 ? Sprung buffers are a nice option as is a brass smokebox dart.
Will I live long enough to build it ? That's another story, but it is a super kit