[EDIT: Updated Letters]
You're subforum crazy, I swear! (every damn day!)
I don't really think it's necessary. We can have the conversation here and whatever good information we assemble you or I can add to the wiki later so it'll be easy for folks to find. Forums are where you have conversations, and conversations wander. They don't stay tidy for very long.
Okay, first thing about your letter labeled parts: There are supposed to be slots in that base circle and tabs on the supports. Did you take these images from astromech.net instead of creating images from the .PDFs? (not that that's a problem, I just want to make sure there's not a bad set of plans out there somewhere.)
Using the labels you have given the parts above, this should help:
The only remaining confusion I can imagine is the matter of H and H1. The wider circle, that is to say the thicker one, goes on the bottom, and the narrower one goes on top. This forms a shelf that the cylinder of the grill can rest on top of along with a ring that wraps around the outside of it to help hold it in place.
I hope that helps