I am not sure I can see much in the way of custom parts. If the car is an early de lux, then it will have two tone paintwork, thus. It would more than likely have extras like eyelashes, additional end trimings, clock and so on. Portholes were an extra. The first 6 months of cars did not have torpedo lights, even then they had klienschnittger lights first, before going to the torpedo light. The wheel trims are Roadster, technically wrong if its an early car, but as a retro fit, why not. Its not an early dome, but you cannot buy them.
Early cars did have brown interior, with dark brown piping. But not like that and never, never, do you have stitching on two seat cushions at right angles to each other. Exhibits bad taste. It ruins the interior, and the brown is dog turd shade, not the gentle pastel colour it should be. Knocks a grand off for me. I could not live with it. To be that early the switches are wrong. Likewise the mirrors. If the switches are right then it should not have brown interior. It would probably have been black with white piping. If brown then the interior paint is brown, thereafter its black. I could go on. Its this attention to detail that should command the price. Not that it looks pretty, which it does until you open it. Like a calendar model with a tooth missing.
Nothe interior trim set is pants, needs took out and the correct period one put in to match the rest of the alleged age of the car, early 1957ish. Failing that one of the optional extrea trims, like snakeskin adorned set. A set is currently for sale at £400 that would ge straight in and the car would look twice the machine for it.
Schmitts had Funk radios. They are very rare, big and you cannot pick up much in the way of a station you want to listen too. The two knobs went either side of the small pressing on early cars. The pressing coming out for the station finding teller. The larger hole with a blank plate was for the speaker, which had a rather art noveau surround and grill. Some cars have the grill, but no radio. I think two radio sets exist over here, but your talking about a thing valued in four figures.
No idea if radials are available on 8 inch. The schmitt trike is not designed for them. I think it might be a dangerous move. At the moment the car tends to skid, before it tips over. It is therefore predictable once you have learned to drive it. I feel radials would not give you that feed back and with the likelyhood of softer sidewalls a flip would be sudden and catastrophic. If your going to put round at 45 mph why would you want radials, that demand more power to move them anyway. It would be an interesting experiment but I think quality crossplys would prove the best option for fast work. Its a frustration that despite Avon making a tyre specificity for Schmitts, the Schmitt clubs have steadfastly refused to even talk about a re-manufacture of them. All I here is it would be to expensive. Well without ever asking, who knows? Now the cars are not doing miles its probably to late. I get accused of negative thinking, I disagree, this reluctance to invest in quality is negative thinking and plain bone headed. If the majority of cars work properly, they would more likely be in use. Thats positive. Then cars like the one in this thread would have a better chance of being bung right.