I have to dig my tutorial out, it's buried somewhere, but if you don't have a lift, it really is a painful job, not really difficult, just painful to do crawling around on the floor... I'm the guy that came up with that O-Ring you bought, so I know how it feels to work on it from the ground... which I did purposely to see the difficulty factor.. (and, I actually had another bike on my lift at the time...) so as to get an idea of the "job" as most folks would have to go thru.. On a lift, I could complete it in an hour.. on the ground, double that time, plus some more.. (up / down / back and forth for wrenches and tools.. etc., )
pretty much all the plastic below the upper parting line, and up front, needs to be removed, as they are all interconnected by tabs, and plastic rivets, and such, which are fragile somewhat, and cannot be "flexed".. then the radiator lower bolts loosened, and top bolts removed, so the radiator (still with hoses attached) can be "rocked forward" and laid upon the front fender protected by rags, or cardboard. then you can access the bolt on the sensor, and disconnect the harness, and clean everything when it's removed, prior to installing the new tighter fitting o-ring.
You mention Northern Fla., our good and trusted friend Steve, is near you, and has done this a bunch of time, and I know he keeps a large supply of the MOB o-rings on hand... he's a great mechanic, and knows this job well.. and can make short work of it for sure; BUT, he is recovering from some health issues, so I can't speak for him, or his schedule.. might want to use this post to contact him, his info is contained there...
http://www.zggtr.org/index.php?topic=20483.msg253672#msg253672best of luck,