Obstacles
I mentioned the first obstacle, that being the burners. They were very well made, but this grill is over 20 years old and in its latter years was not treated to much, if any, cleaning - at least if that drip tray is any indication!
@R Chin, you have been a big help to me already, and I will be taking you up on your kind offer to send some questions. I will need some time to do more disassembly, but I will look the burners over carefully to see if I think any of them can be salvaged successfully. First glance tells me that several are way far gone, but let's see.
The next - and really biggest - obstacle are the front and rear combined grate and flavorizer bar holders. This setup is almost identical to what Weber was already using in the 1st generation Summits. Even so, there are no sources that I know of for new replacements, and any donor grill will almost certainly have the same issues. One problem is that on the Vieluxe this entire assembly was welded on vs. bolts used on the Summit. There are posts here showing that the spot welds fail, and mine have on the front assembly. The prior owner looks to have used some machine screws - apparently not stainless - to reattach the assembly. Some of the screws have failed, and the entire thing is wobbling and definitely not solid enough to hold heavy grates and flavorizer bars. Assuming I would try to keep the main part of this assembly, I see using stainless bolts and nuts to securely reattach.
R Chin was able to have Dave Santana make him new clips that hold the flavorizers to replace the failed ones on his grill:
I am afraid that mine are too far gone to repair with just new clip inserts. I am thinking that I will need to have something fabricated. Maybe a straight stainless ledge with stainless bolts spaced to make "holders" to keep the flavorizers straight. Seems like that would be a lot less fabrication hours:
Another lesser obstacle is the kind of cool, but apparently not strong enough, pot that catches the grease from the drip tray. Mine isn't the first one to exhibit burn-through of what I believe to be the aluminum construction:
My initial plan for this is to clean up totally and then see if I can (1) patch with JB Weld Extreme High Heat and (2) adapt something like the foil drip pail liners used on many pellet grills.