[hiccup]

I have done this. It can be easily done in the water--assuming everything goes smoothly. Check out this video:

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However, in my case the screws had seen enough saltwater and age that the system would not disassemble easily. I essentially had to cut the entire system apart to get it off. No way to do that in the water. Yours look corrosion free and they have tweaked the design so that it is less likely to become impossible to disassemble. With that in mind I doubt you will have that problem but keep it in mind.