The old Cayman was a S555 with a MK-17 so it makes sense that this would be equivalent to an older model S600. The old Bonaire was an R395 with a MK-17 and finally the Aruba was a R395 with a MK-2. I have seen Caymans on sale for $265 or so which makes them an excellent deal. The adjustment knob can always be added latter.
I think the older cayman now is the sg-500. ? But I could be wrong. I didn't look into it.
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