Tracy,
I use that same combination and I like it a lot. Dan Berg says that that canvas is indistinguishable from Lyve at much lower cost, so that is good enough for me.
I am a bit lost with your description of your method of developing a profile. Your Preset may be based on the HP canvas, but that just relates to thickness and cutter use. A profile, if done completely, is unique to the material being profiled.
I had the Z3100 generate the target, dried it, then varnished it. The next day I had the machine create the ICC profile and it works fine.
I don’t think you can expect the same vibrancy on a matt canvas that you can with a good gloss paper, but the results I get are very similar. The Red gamut is a bit reduced but not noticeable unless you are looking really hard.
If you use a PC, I can email you my profile if you want.
Regarding Gloss Enhancer, I don’t think you should use it if you are varnishing your canvas.