OK, thanks for the reply.
Does it actually do that for you though? I've just checked it again with the skippy: I set the logitech panel to 900 degrees, calibrate the wheel in iRacing (turn fully one way then the other and return to center and click; then 90 degrees left, click, and return to center and click). I then find that my physical wheel, the skippy virtual wheel and actual front wheels move in synch with each other until the virtual wheel gets to around 450 deg (lock to lock), whereupon it and the two front wheels stop. But the physical wheel continues until 900 degrees (lock to lock). So, as I've said, I've got that slack to take up if I go past that point.