I finished the Waste Canvas experiment, rinsed it, ironed, and blocked it. The silks I used - Kreinik's PingLing and Au ver a Soie's Soie D'Alger did not run, so I didn't have to worry about that, thankfully, since I had to get the stitched area very wet and keep it wet in order to remove the waste canvas (that glue sets back up real fast). I prefer the look where I did a full cross in the over-one section (the green next to the body), but I was splitting the threads as I couldn't see where to finish the cross, so wound up just doing a tent stitch. It works, but... Anyway, I do believe I can do The Egyptian Garden Mandala by Marine Weber using this technique.
The second piece I finished is a canvas embroidery piece that is supposed to emphasize diaper patterns. Not so sure I achieved what I was trying for here - the effect of block shape and placement on the perception of whether a stitch is a diaper pattern or not. I'm still thinking about it.
Pic are on RTCNP