Model Rail magazine has commissioned Dapol to produce a ready to run Y3 shunter. It will doubtless be available in the next year or so and sell by the bucket load.
I say, "Oy, Model Rail - Leave the nice easy to build shunters alone ! Go and do a fiddly loco instead !"
I say this because I have a Y3 in my locmotive stud for Melbridge Dock. It's built using a Crownline kit and runs on a Tenshodo SPUD. Being based on a motor bogie is a probably the reason Dapol plumped for it as they can use parts from existing diesel power units rather than going to the expense of tooling up the parts for a proper steam engine.
Sadly, that's what has made it appealing to generations of modellers too. Nu-Cast produced a kit in whitemetal, Crownline did the same thing in etched brass. Higfeild (I think) made a vauum formed 7mm scale version which to be honest wasn't that good. As for scratchbuilding, there isn't much that is simpler. But no more.
The new model means mine will stay in the box in the future. Y3's will appear on every layout. They will be on the front of passenger trains (wrong), goods trains (wrong), shunting branchline stations (wrong) and generally infesting the scene a bit like the ex-L&Y Pug, another excellent RTR model, does. People haven't paid good money to come into a show to see me running out of the box models, they should demand more than this, or at least I want to provide more.
Nowadays we are blessed with some excellent quality ready to run models which let newcomers into the hobby far more easily than the fold days when you had to make every single item. Prices aren't bad either. Despite comments in one magazine that a £135 9F locmotive is poor value for money, the costs aren't that high either in my opinion. Building kits certainly costs as much in money and you still have to invest the time !
I suppose this still leaves Toby. But I bet they do one of those one day too.