tank dismantle and glass cutting

[reefnut]

well i managed to cut one piece and broke the other.after a trip to the local glass shop im ready to start putting this thing together.toatl measurements are 38"l x 20"h x 22"d.rough capacity is around 70 gal ish.two more question though,1.what is the best silicone to use?so far im planning on GE Silicone 1 100% silicone rubber,thoughts or suggestions please.2.im going to keep the joints as clean as possible and dont plan on any bracing at all, just the glass box, any thoughts on this?the original tank was 8" longer and had absolutley no bracing.the trim was mitered at each corner.thanks.