Thanks Eric, you're a friend, aren't you! I'm so glad your own work has advanced to the stage you described. I'll work a bit more on the Shvetsov M11 five cylinder engine and we'll see.
It now strikes me that I haven't actually seen a build of an engine with a full set of flanges. I know of many kits and designs which include it, and I have seen a number of white-build promotional photos, so I know the pro's can do it. But has anyone mortal, someone we know, actually done it?
Leif