I was successful, and wet. I had it all planned out I even bought an extra elbow barb/street spigot so that I could have it all pre-plumbed. The controller and power brick were already in place. In theory yank the emergency pump street spigot out of the bulkhead, pull the pump out of the sump, drop the new pump into the sump, push in the street spigot, hook the pump cable to the controller and turn it on; 2-3 minutes.
The reality all of the above steps followed by; new street spigot is marginally smaller and pops out of bulkhead spewing about 800 gph of Red Sea Blue Bucket saltwater all over the foyer, frantic reaching for the on/off switch, knocking the ATO sensor off the rear panel trying to redirect the geyser, followed by retrieving the ATO sensor magnet from deep in the bowels of the stand, pulling the street spigot from the emergency pump and replacing it on the new pump, placing the new pump in the sump again, pushing in the street spigot, turning the switch back on while holding the street spigot just in case, reinstalling the ATO sensor and cleaning, floors, walls, tank, and stand of excess Red Sea BB.