Weesatch elastic belly strap

[shakespeare]

I was thinking today about ways I could fix the issues most people experience with the Wee/Wasatch, that being looseness when mags leave it, and difficulty tightening and breathing at the same time.

What about an elastic waist band? Spandex or something? Has anybody tried this? And what materials would you recommend for me to try it with. I've never customized gear before, so I don't know where to start.