Well, first thing to remember is that the motor must have support. I have mine mounted so it is resting on the electrical box, but I found that I sometimes prefer to lay the box on its side. To do this I crammed some ridged Styrofoam in there to add support if I laid it down (making sure not to block the air vents of course).
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Here you can see the remote I got, or Sean got for me really. He found them at Ace hardware I think and they were being sold as Christmas tree remotes. I plug this into a 15 amp breaker power strip. I know, it's not a GFCI, but its better than nothing.
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To help me w/ the holes I was drilling I removed the head and put the screws back in and covered the screw heads with ink from a Sharpie and pressed that up against the box (lazy-man's jig) and drilled out the black marks. Only took some minor reaming to get them to fit. You would think that the screw positions would be in a up-down-left-right configuration in respects to the the electric box, but its not, it a few cm off.
Now that I've completed the box, I wish I would have mounted the pump higher up in the box. I have to use buckets to raise the box up if I want to have the pump running in a vertical configuration or the QD will be too close to the ground to allow you to hook a hose up to it. Think of all angles when doing this project, I wish I did.

and yes, I'm pulling straight off the tun, but that's for another discussion Andy
Good luck Matt!