Hey Bill, if you begin a quest of BC cuttings, please document here or on your YouTube channel.
And also, only use rooting hormone on half of them, or try powder on a third, liquid on a third, and nothing on a third....
Then you'd have something there worth noting, in my humble opinion.
I was chewing on this idea. It doesn't take up much room to have three or four small tubs of soil with 100 cuttings in each. I want to do pre-bud break, during bud break, and after leaf-set. My tests will be nothing, rooting hormone powder, honey, and honey with cinnamon (see below). 30 to 35 cuttings at three different times of the year for 3 rooting compounds and a control group. 400 cuttings. Sheesh.
I like @GGB's idea about using at least second year growth. That'll give me cuttings with a wooden core. I also like the idea about using honey. I had never heard of that before.
Here's a video where a woman tests different compounds and concludes that blended honey and cinnamon make a better rooting compound than honey alone or rooting hormone powder.