powertap: fixed

I finally fixed my PowerTap.

I couldn't get the hub cover off with a traditional wrench or a strap wrench, finally called Saris to figure out what's up and ended up ordering their special tool. When the tool arrived I immediately recognized it as the funny little black thing that I remember coming with my wheel but, since I had no idea what it was, had either thrown away or discarded into some dark corner of my basement laundry/cycling gear repository room. Anyway, with the proper tool, getting the cover off was a snap.

Batteries now changed, the PowerTap is working perfectly. And so I rode for 160 minutes over two Michaux passes and rolling Franklin County hills to reacquaint myself the quantitative value of work.