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Kevin
You are probably correct. I know they took the 90 back and upgraded them for a price. I think there is a difference in the database, and yes, they were very popular in oil burners. They were also very expensive. I think the 94 is the same as the 90 but more intuitive with a moving map. Trouble is the trays are different and everything needs to be swapped out. I tried that route and gave up.
Guess it depends if you want certification or not.
Wait for Osh and get a new 530 on sale...........
bob
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