Then again,I guess I could use a standard size trim butted up against the sheetrock then place half-round trim over the seam (sheetrock to trim seam)
Yep, thats what I meant. Hindsight is usually 20/20 It SEEMS that the standard jamb would be 1/2" narrow with RC on one face. IF you had a table saw, you could cut custom jambs from wider stock, to match the sheetrock face to sheetrock face dimension. It would come out cleaner, but if your jambs are already in place, oh well. However, two layers of trim might look good. I personally hate 1/2 rounds like that. It always looks like a mistake cover to me. Actually, thats what its for.

With 2 layers of trim, you can offset the second layer and will look like its machined that way once it has a finish.
Are you painting the jamb/trim or sealing it au natural? (lime?) I've got some of the details at doors and windows worked out for mine. I'm not using wood. I'm using special aluminum extrusions, that will be siliconed to the sheetrock, and exposed Stainless steel flat sockethead screws to hold it to the jambs, which actually will be laminated with chemetal(brushed peweter) Most of my studio will be detailed with metal type stuff. I have source books for products never seen in a studio. Thats why I want to use them.
Nobody else will have the same type detailing as mine. I'm a detail freak. Ha! Thats my job. I'm a detailer. I even have a couple of sheets of stainless tambour. Cool for curved stuff(polycylndrical diffusers). And I've collected tons of special store fixture hardware, that I've saved for 10 yrs for my studio project. Plus multi layer translucent colored plex diffuser/lighting/de'art objects(actully large custom lava lamps

Goofy, but fun!!! And thats what this has to be for me, fun, fun, fun!! I even have a console frame that I welded up 2 yrs ago that looks like a floating gullwing. Only one leg In front of it. Its a 8" square steel
I beam that will be bolted to a cable chase in the floor.
In turn bolted to the underside of the console. Well, enough of my bla bla bla!
Thanks again DD, and good luck with this. Its looking WAY TOO COOL!!!!
fitz
