Those are beautiful and some wonderful work! I do want to throw this out there -- are we sure they radiused the corners on the emitter? At first blush it looks to me like they took a flat file and just knocked the corners down. Which is a pity because your work looks much nicer.
hey, I wouldn't be able to say if this was actually done with a file or a radiusing tool to be honest. I matched the radius in my 3D model from what I could see on all the refs and just radiused that with a tool on the mill, the end result is pretty similar I hope.
I'm going to machine the parts "nicelly" because I wouldn't want to sell parts with a too dirty machining look, that being said, all the assymetries from the original part, all the artifacts from being made on manual machines will be there. If someone wants to take a file to the corners, it will be easy to do so afterwards if you want a more "dirty" look
here is a small example, there is one ref where we can see pretty clearly the turning quality on the inside of the shroud cylinder. I have a good experience at turning a clean surface even when going by hand with my tool, for instance as seen on the outside of my shrouds here, they are not made with the automatic advancement on the lathe, that being said, I purposefully went a bit "rougher" on the inside to match what we see on the original
to be clear, inside turning is always a bit more dirty than outside turning, you don't really see what you do and you have to use a thin tool with a long length to reach inside, giving more vibrations and making it more difficult to get a clean result. In this case, I voluntarily didn't "try" to be too clean about it to match the original
to get back to the corner radius topic a bit, this will also show the hand opperated machines signature. if you want surfaces, facets, radiuses to flow perfectly from one surface to another on a lathe or mill, the piece has to be done in one go or at least repositioned perfectly in the chuck like it was the first time around.
In the case of the corner radiuses here for instance, this can't be done on a manual mill and I'm turning my piece around 90° for each bevel. the result is that the bevels are sometimes slightly un-even, which again, in this case doesn't really bother me as I'm trying to reproduce an old school made part done a bit hastily, so to me, the unperfect result is... perfectly what I want
I hope everyone will feel the same
here an example were we can see a bit the uneven bevel:
I'll just write a second post to show a bit today's tinkering.
cheers all