Also, to take a poke at JRR, who I haven't riled up for a while, any decent mechanical designer would tell you that there's no such thing as too big a radius on a transition like from counterweight to the crankshaft journal.
Now, bigger than one would expect? Certainly.

The above post makes this point moot anyway, as it appears that the positioning of the bearings in the main saddles is what runs the edge of the bearing into the crank radius.

To the Source of this new information, thanks. It's nice to know the "real" facts.
There also appears to be a right and wrong way to install rod bearings which I haven't noticed, but then I do the work so slowly that if something doesn't look right I change it around without really thinking about it.

R.