Hey there Denis - great stuff!! Looks like it turned out really well. My article was, in turn, based on Bill's (Glenhuon).
I'd love to run a comparison between the 400 and 900mm f/length variants of the 80mm objective, and then go the 102mm when they make it available again.
Glad to see that another one of us has gone to the trouble of assembling their own scope. There's a certain pride that one gets by doing it.
Congratulations!