I like it. As others have said, even if it (or a variation) has been done, no reason not to do it yourself. In this case, prior work just indicates you're going to have a good looking, nice flying rocket.
Personally, I hated rolling paper shrouds in the past. NeilW is great at it and uses the technique often. He and I dialoged via email about it and he got me to try the 'Super Shroud' technique. Apogee newsletter 349 talks about it, but it might also be posted in other places, as I believe the article was a user submission.
Anyway, I did it the 'regular' way with a single layer template, then did the Super Shroud method and liked it a bit better. I iterated a few different methods that I thought might work for me and eventually got one that I feel like worked 100% of the time, no matter how bad your (i.e. me, not you) modelling skills are. Regretfully, it worked practically flawlessly for 'high taper' shrouds (i.e. maybe 5-10 deg) but did not work for squatty shrouds (i.e. 20-45 deg+) at all - total failure. I abandoned the method, but do have a template generator spreadsheet that can give the parameters to make a strong and easy to make paper shroud. Your shroud looks like it would be successfully made, as the taper looks pretty aggressive.
I'm not sure if that was your plan for making the cone, but if you're not getting the results you want, PM me and I can run numbers and send you a template to try as an experiment. It would be for a 3-layer thick card stock shroud, most likely, as that's how I got the best results.
Sandy.