Allen... thanks for the info. This one is indeed thicker than a standard 8x10 holder but the distance to the plates "looks" about right... I haven't measured. The end (bottom) is correctly postioned with a standard 8x10 holder and the sides are plenty wide to allow trimming. At any rate, I'll measure depth before trimming. I'll have to find that information and dig out the old micrometer.

Thanks Again!!