Thanks George, I did consider going down that road and I may even buy one as they are a very reasonable price and usefull for other things
Think outside the box,or in this case inside:heehee:

Buy one, position the foil somewhere on the spindle,strip down the tachomete handheld unit,unsolder the the sensor and put/mount the digital readout in the front of the case n the boxford,solder some wires to the sensor and resolder the wires from the sensor to the digital readout unit.