Nice work Paul,
And just to be clear about what Gene said above in post # 4, you want to make yourself a small cylinder out of a clear plastic soda type container, trim top and bottoms of the bottle off, and place that around your cutting. Then take a nice, light perlite, and soil mixture and gently gently fill it around the cutting so it covers those new roots. Ever so slight water at this time, just to dampen, and keep it covered with your larger humidity dome.
If you don't cover these young new roots, they will quickly dry up, and vanish and your cutting will have expended a lot of growth energy.
All the best, looks like you are on your way to a new tree!