Peter, I had watched and commented on your demo when you first showed. This morning, i came across it again and rewatched the demo.
A new questioned came to me immediately. Thatdepth adjustment knob on the front appears to be very handy to hold on to as a guide to the machine while cutting. The same is true when using an armstrong powered hand plane, of which i have several models of varying size. On every one of those, i make full use of that knob. I note that you are doing exactly the same with the Hitachi, as I am sure most other WW'ers do as well.
My question: Is there any way to lock that knob so, if one holds tight and has a tendency to rotate the knob as he/she plows thru a cut, the knob does not inadvertantly rotate to a deeper, or shallower, cut?
I have never tried any other power hand planer (other than armstrong powered models) than the HL 850 with the adjustment tucked safely away from such inadvertant misadjustment.
Tinker