Spoke with Phil at Rim Guard. He's one of the owners and a great guy with loads of valuable info. He refered me to American Tire & Services in Bardstown KY at 502 348 3018. Before calling, make sure you know your tire size and if they are radial or bias ply. If radial, you will only need to fill them 75% or to 2 o'clock position. If you fill a radial tire up 100% you have essentially created a bias ply tire and would be like driving on cement wheels.
If bias ply, 100% fill is necessary.
Pretty sure I read that you know not to mix calcium fill with any of the "new" products due to gelling, but just in case...DON'T!