Thanks for your fast replies.
I think that it will take time to remove the negative feeling towards checkmate mags as a result of the sand issue. The more you get out into the market the better you will be. I own a 92FS and a few 1911's if you want to throw a few my way for testing.
People tend to complain about what doesn't work not sing the praises of what does. Again good luck with your efforts.