I put my Sportjet into the shop every fall, and they go through it completely.
Wear ring and impellar are checked as well as the stator fluids changed that I cannot do myself without a pump , etc.
I pick it up after work, put it away under the tarp, and put the batteries in my garage.
The following spring I put the batteries back in a fire it up - period.
The piece of mind in a very busy schedule for me is that it gets done, and I can use that time for something else.
I suppose I could get the pump to drain the stator, etc, but that time involved and the lack of space in my garage are just two factors, I prefer to take it to the shop bought it from....
Cat
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Anytime I figure I've got this long range thing figured out, I just strap into the sling and irons and remind myself that I don't! 
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