O-200 Crankshaft STC for the C85 Continental ---- How's It Going?

We are about to buy a couple of them if the history is good. Anybody know
of any glitches with the modified engine? The STC is $350 and was
originated by Don Swords of Don's Dream Machines in Griffin, GA. You
install an O-200 crankshaft, O-200 rods, and O-200 pistons in a C85, for a
total cost of around 3 grand, not including any other work needed on the
C85, of course.

Some people are using this STC because of the scarcity of C85 crankshafts.
You can buy a new nitrided O-200 crank because Continental is still making
them, although like DeBeers they limit production.