I do have an ORC and the tractor hydraulics are in Position control. I will get a shorter top link and lower the tailwheel as several folks suggested and hope for the best. Will report back.
The situation is made worse by my tractor"s hydraulics: The lift arms always go up when you lift the control and always go down down when you put it down, and it will mostly hold any position you leave it in, but the relationship between the control location and the location of the lift arms is very inexact and non-repeatable. So you can"t use the wing-nutted stop to accurately limit the lift arm height.