Yes, I had made a ray-way quilt earlier in the year (or was it last year?), and was kindof sortof following a similar type method. Sew inside out and then invert and sew closed. It's easy (easier) with the synthetic insulation.

I may be moving over to down sometime over the next year. I have a few projects in the works before that... and I have to let the budget build back up before I start working with the expensive materials...