Good news from Remos about my belief that the cowling had to come off for every preflight to inspect carburetor and exhaust springs. They absorb the vibration of engine startup and shutdown. We can leave the cowling on during preflight! The springs will be inspected during regular maintenance. (But now we know how to do it.)
A lot of you have commented on our oil and now we have the official word from Remos. Use Aeroshell Sport Plus 4, and so we shall.
UPDATE: Now that I’ve done a mea culpa for saying preflights require a cowling removal, I’ve reread the checklist. There are things on there that can only be done by removing the cowling. We’re back to becoming cowling removal experts.