Here I used a printout from an earlier scanned image (from the Cornell class).
I flipped over the paper and dry brushed Burnt Umber Reddish over the area to be transferred.
I taped the template to a panel and drew over prominent lines and shading using a 4H pencil. The transfer was smooth and reliable and I found I even had some control of the density.
Next I added a bit of background using the same paint, just to get the white out. That 1" brush was used for both the back side of the transfer and the background.
At this point I'm softening transitions and pushing in some nice deep darks, still using that same umber.