Anybody build their own 5th wheel?

[SnoMo1 at aol.com]

Has anyone thought of picking up a DigiKey catalog?  There seems to be a good
selection of OMRON  "slot" type optical sensors available. These units will
handle frequencies to 1000hz, have built-in amplifiers, and are relatively
inexpensive ($15.00 USD). They should be very immune to external light
sources. It seems these "slot" type devices would work well with some type of
disc attacted to the wheel hub.
  Just my $.02 worth. By the way, if your need a DigiKey catalog, call
1-800-344-4539.

Mark
SnoMo1 at aol.com