I recieved the new parts late Friday. The RV-14 baffles are designed for the IO390. They are much more refined, with most holes drilled. Assembly is simple reaming and deburring.
I did a lot of test fitting. Some key points:
-- We had set the floors about 1" too high, resulting in a steep intake angle. -- The new design uses fewer parts. Flanges are used instead of separate angle attachments -- The design is more complete - with things like the air inlet pre-cut in the right floor -- The Snorkel input mates solidly to a new fiberglass Air Filter Holder
Instead of two-page instructions, the RV14 baffles have about 30 pages with plenty of pictures. As good as they are, they are still version 1. I think they will be further clarified over time.