Horsetan

The Worsley Works one is probably the one with the most potential, but you have to make your own detail castings.

Same here.

Count me in for one set. I'd like to see if they can be adapted to take the Dave Bradwell sprung cradles. EDIT to add: and a matching set of 3D-printed detail parts

Hiding in plain sight?

If it's there you want to be, I wouldn't be starting from here!

He can do that anywhere....and frequently has

I frequently had to use them between Victoria and East Croydon when I was acting for clients in the Croydon area. The other thing about the Southern 377s is that they played a major role in some of the Microsoft Train Simulator add-ons: London South-East, and South Coast. I had the original MSTS and "drove" the 377 to various virtual destinations including Brighton, Ford (change here for the open prison), Littlehampton, Bognor Regis, Worthing, etc. Hmm, I think 100mph is equivalent to 161km/h. 128km/h is more like 80mph

Mine was a Sinclair Cambridge Memory. Looking back on it, the digits would have been the correct size for theatre indicators on 4mm scale colour light signals.

My first calculator was a Sinclair pocket thing, with red 8-digit (not LED, but sort of electroluminescent) display. Cost ten quid from Lasky's, the hi-fi specialists, in Oxford Street in about 1976.

Fleischmann wheel profiles were always coarse, but then Roco models weren't that much better back then. Nowadays most Continental HO models try to conform to NEM profile (2.8mm wide tyres), which is still quite coarse. Roco in particular still can't decide what profile to use - some models look as though they have RP25-110, others are NEM. I have a model of the famous 18.201 and that seems to have three different wheel profiles on it

The Class 5s were supposedly capable of up to 50mph if occasion (and track condition) allowed it.

Sometimes improvisation is the only thing available.

So, a 100% result there!

Code 75, I would have thought. EDIT to add: I did wonder, if you were just wanting to mess with 21mm first, whether there might be some mileage in taking a short length of RTR 16.5, sawing the sleepers down the middle and then inserting/glueing in your own plasticard fillers to space things out to 21mm. I remember reading about someone who did this when he needed some quick plain track for a fiddle yard in P4, but only had some OO to hand. He was surprised to find his rough method worked. Obviously you'd still need a track gauge or two to ensure the rails were correctly spaced, but this sounds a relatively cheap way of trying things out.

Worsley specialise in "scratch aid" etches, especially in 4mm scale. They are meant to make your life easier, as David says, so that you are assured of being able to build the basic body. Detail castings, however, are left to you. For example, I've had a Worsley GWR 42xx/5205 2-8-0T on the go for a while. The basic body structure is mostly done, with just the riveted overlays left to form. Worsley also include the chassis (a fold-up, even in P4), cylinders, motion and pony truck. In the intervening years, Brassmasters have produced a fully-sprung P4 chassis kit - actually intended for the Hornby model - and this has some potential to be adapted to the Worsley body. Worsley very rarely provide any castings unless it's a model for which there aren't any bits from other sources - the NCC "W" 2-6-0 etch set, for example

Late news: the Markits option may no longer be available, as the death of its proprietor Mark Arscott has been announced.

As you know, Ultrascale is a one-man band. I've never seen a wait time shorter than 5 months. In many ways, he's a victim of his own successful products because, as soon as he manages to reduce the lead times, word gets round and everyone piles their orders in, leading to an immediate lengthening of wait times, sometimes longer than previously! It's not inconceivable that customers have dropped dead before receiving their order...

Actually RC might be perfect for something like this

3D-printed 21mm track could be an opportunity for "PlugTrack" - Martin Wynne's Templot-derived track. Ultrascale - if you can get round the now 1 year waiting time for orders to be processed, why not?

"The worst kind of swine", etc

Good news for the price gougers.

The thing I find difficult is getting the CAD software to work.

At least there's no arguments about the track gauge on that.

I was only aware of P4/S4 standards being applied, via those published by the Scalefour Society, so that's what I chose to use. To make a small fortune in finescale anything, you usually have to start with a large one. Otherwise, like integrated Irish public transport, nothing would ever get done.

They did it with the Class 24. I picked up a slightly broken cheap one and, later, an equally cheap set of P4 wheels for it. Not bad. Accurascale's Class 55 P4 wheel pack is 98% correct for the IRM "A" class. Just fit the wheels onto the IRM axles and 21mm gauge becomes reality.