G'day, yes I agree - ARO is always a good idea when there is moisture around. This was a rather extreme example of what can happen to bearings in a short time. I was quite amazed at how much moisture was in the bottom of the engine (judging from the "tide mark" that the rust left).

I only bought the ceramic bearings because they were so relatively inexpensive. I had also to buy a set of bearings for a rather battered Saito 120 which I was given but it only got the $6.97 solution. They do look fine though.