[Broncazonk]

With due regard to Michael's question, I wonder if I might interject a question about the circular access panel that's readily apparent on the lower cowling?

That circular panel provides access to an oil system heat exchanger, which is different and separate from the main oil cooling heat exchanger (with is up front and integrated into the annular water radiator.) In other photos, it is possible to see a large diameter oil line exiting (in a rearward direction) from the bottom of the annular oil heat exchanger and connecting to what appears to be an expansion tube before (possibly) entering the main oil storage tank.

Is that interpretation correct: the circular access panel in the cowling provides access to a supplemental expansion tube heat exchanger at the bottom of the engine?

Thanks!

Bronc