AVA Flatfielder vs inexpensive EL Sheets for flats

Now that I've moved to a larger chip, it's become essential for me to take good flats. I've tried the white T-shirt over objective without too much success. Sky flats aren't really possible for me as I have to travel some distance to reach dark skies and by the time I get there it's already dark.

I've heard about the AVA Flatfielder item and it appears to be just the ticket to my flatfield woes, but it's quite pricey. I believe it is simply an EL sheet in a metal holder with a digital power supply.

My question is, has anyone thought of, made and/or used a similar EL sheet based item for taking good flats?

If yes, what type of results did y'all get? Is it a viable alternative to sky flats and/or the AVA Flatfielder?

Anjal.

That sounds like an interesting solution. I wonder about how "flat" the manufacturing process really is though. If these are only made to look uniform to your eye, then they are likely flat to at least 1/4 an f stop. But that is not too flat when talking CCD. If you could somehow move around and rotate the screen in front of your aperture while taking a bunch of flats, you might get something pretty good.

Maybe you could get one and try?

Another solution that might be as good or better would be to use one of these offset a few inches to illuminate your T-shirt. ???

Charlie