@t3p3tony I think there is a step missing in the calibrate the Z probe trigger height.
I followed the steps over and over again and the bed kept stopping at a distance too far from the nozzle. Then it occurred to me that the z value in the config.g file may be adding to the value the duet was reporting. So i set that value to 0 and then the bed when all the way up and too far. So then i used trial and error in the config file to get it just right. It took many tries but at last count it worked right. Final value so far is 2.87.