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Vinny,Thanks for the feedback. Can you hear any vibration from the bottoms of the unscrewed panels?
Here's some photos from my 470. It would be tight!I have to do LED work on mine. Not sure if the one cupholder access would also be blocked.Also, hope for no pinched hoses from the factory!
If moving the tub is easier then building a breakaway section of the deck then do that. Moving the tub 12 to 18 inches away from the deck may give you enough clearance to work on that area if need be. Remember you are talking about 1 pump in a corner that may not give you problems for the life of the spa.