I made a little more progress this afternoon. Got the carbs set into place. I found that the breathers I have won't clear the shelter sidecovers, so I'll have to run either stacks or something verrrry narrow. Or scallop some sidecovers for these carbs. (Not these, a "backup" set!)
I was going to try a slightly different approach on the linkage, but it's proving to be too much of a hassle. So, I backtracked and am following the established path with a cross brace to mount the pivot onto. I had some aluminum stock on hand, but a little smaller than is described in the Randakk literature. I'm trying it and like the smaller profile, but had to take some material out in a couple of spots to the point where I'm not sure it'll be strong enough for longterm reliability. (Possible breakage).
I got motivated to get the assembly in place since, really, that's the only way you can get after it. Thinking about how to make it work doesn't get it done. Only by mocking it up can progress be made.
So, the easy part is done. Now it's getting the linkage finalized and the carbs tuned. I'm actually getting kind of excited.
(Did I mention how freakin' expensive stainless hardware is??) Sheesh.