First Century of 2009 in 5:12:30

Funny thing about today's ride. The Powertap quit working at the 4:20 mark (he-he) The question is, how long ago did the wire snap? Since I look down at it pretty often it was a minute at the most.. You might recall my very ugly but effective repair job I did two months ago. Well it's the first place I looked when I noticed the speed and watts readouts went blank. The purple wire was separated again. Your quick thinking hero had a back up plan, of course. His Polar heart rate monitor was busy recording speed, distance, heart rate, elevation and so forth, so he immediately hit the lap button to at least get good data for the rest of the ride. The Powertap was kaput, but it was reading 4:20 and 84 miles ridden- that's 19.4 miles per hour. Being so ticklishly close to the century mark, I decided then and there that I must do at least another 16 miles or else regret it until I die. Expecting to do the same average speed for the rest of the ride home, I did all kinds of math in my head in terms of how much longer I would need to ride. (One sucky thing about the Polar 720i- it refuses to give you the mileage of a ride, while you're recording data) With the Polar now recording a new lap for me, it seemed like a sure bet that one more hour would cinch the century, no problem. In fact, I got to my neighborhood a little bit early and just kept riding- went up Seven Mile Hill Road and back down it, adding 1:07 to the 4:20 I clocked on the PT. Surely this meant that my total would be around 105 miles or so. Unfortunately, I doubt if I'll ever know the true mileage- it turns out that the Polar was losing signal all throughout the ride and it only recorded 80 miles at the 4:20 point, where the Powertap recorded 84 (these two are usually dead nuts even) Oh well. I just wanted to know one thing- the exact duration of my 100 miles. Well it's anybody's guess, but I'm going with a conservative 19.2 mph average (the first 4:20 was 19.4) and going with 5 hours and 12.5 minutes to complete the first 100 miles. (16 miles in 52:30 makes sense) Sounds like a safe bet. Of this, I rode solo for one hour to meet the group, I rode 2:30 with the group, and then I rode 2 hours solo to get home. Please use the comments section to congratulate me and heap praise upon me for my accomplishment.
Overall ride time: 5 hours 28 minutes
Overall distance: 105 miles
Average speed: 19.2 mph

Above, the Powertap data is more reliable than the Polar, at least until wires break. The purple speed graph below shows a lot of 'zero' speed, when in reality we stopped only twice to pee, once for food and I stopped once to check out the PT.