Mick
So does that have a resin body on top ?
Richard
To be honest, I haven't decided yet, it's all seat of the pants stuff right now, several steps forward then a few back etc.
I've got three choices:-
1: Slice off the Finney7 casing top and fit, that's the easiest but perhaps not the best, there are some aspects of the resin casing I 'personally' don't like, no one else has an issue but I do.
2: Develop a whole new 3D top and print it off, nothing too difficult there as you have full control over both aspects and can tweak to get it just right. You'd have to be careful with orientation to push any layering into areas that can be easily cleaned, plus the recent tests on the VL80 (always a secondary reason for a lot of my dabblings) fine tuned printing large slab like objects and made the process more viable.
3: Work up a set of casing etches in nickel silver and solder them on, that's the Rolls Royce option but by far the hardest to achieve, large areas with etch relief cause the etch to curl, the sides are terrible and will take a lot of care to flatten ripple free. There's also the issue of forming the cant rail bends and roof curvature and keeping it uniform over the full length, any imperfections will show up badly. Having said that I did manage to get a reasonable job on the EM2 test roof but that's only a small panel, for the BLP you'd either use one big one or several smaller ones like the real thing; your problem there becomes one of making adjacent panels match each other.
It may pay to change the roof material to brass which is more easily formed and I am very tempted to 3D print a roof core that will act as a former and support under the thinner metal skin. It may even be possible to develop a 3D plug and mold to help form the roof panels.
Normally I just bend around rods and shaped bits of wood, it's all very caveman and not very NASA; the VL80 tests started me thinking it might be possible to 3D print formers that grip and hold the metal and aid it's forming.
If you use a 3D core under the roof then that'll give the panels the strength and support they need which means you can use a thinner more malleable gauge, it also means you can solder the brass overlays from the kit onto the metal formed roof panels, sticking them to resin has always been problematical in my experience.
If I can find/make a decent tip (there's no 4 mm tip in my GW riveter set up....missing when bought, replacement never arrived) for my riveter I may well decide to simple roll my own spliffs and hand ball the whole roof, I like the idea of that as a skills challenge but I'm under no illusion how hard that will be to achieve. It'll be no easy task, but it does mean I don't have to wait for weeks (latest I heard is Feb delivery dates) over Xmas for PPD to process any art work; and then run the risk of them over/under cooking it and having nearly no raised rivet detail or great big lumps for rivets.
Part of this project is for another client who want's a full nickel silver casing etched up, so I will have to go down that route for that project, but for these two builds on a tighter build schedule I may opt for any of the above.
The round holes in the core roof are already there for the self tappers to hold any resin parts I may use in the roof sections so that planning ahead worked.
Today's task is to strip the whole front end out and narrow the front face by 0.4 mm at the base, then the skins when added will line up perfectly with the cylinder wrappers at that joint, currently they over hang by 0,2 mm each side. the rear bulkhead also needs a tweak, it's 0.2 mm too wide so the casing skin will sit just proud of the cab skin.