Update on this old dog. Prints say 1951 for the year. Type is a 2BC-VCL. After spending all yesterday getting very familiar with the prints and the circuit I found that what ever direction I would send the car that my 72T was dropping out even though I still had either LU or LD. The 72T relay had 2 capacitors (72C)one of which had a reostat below it. There was no change in leveling by adjusting that reostat. Beleive it that the customer had 3 of these capacitors in stock in their warehouse and I returned today and replaced both 72C capacitors and the elevator hits the floors almost perfect. On my next visit I suspect that my 33C capacitor and both of the 73C capacitors might also be bad. But for know I dont want to disturb it.