tank dismantle and glass cutting

[reefnut]

great advice thanks guys.ive got the tank apart now.used a razor and a .003" feeler gauge(destroyed the gauge but its apart)i hear ya on adjusting the stand and not the tank but that would mean stand,canopy overhaul as i would not be happy with the xtra overhang.my neww problem is that the entire tank is built with 3/8.the extra piece that was glued over the cracked bottom is only 1/4.originally i wanted to use the extra bottom to replace the cracked one as i was told it was at least 3/8.the bottom is non floating and sits flat on the stand wothout any trim.the ends and sides sit on top of the bottom.ya think 1/4 inch is enough if the overal measurements will be 40-42"long,20"inches high and 20 inches deep?sitting on a solid level surface.