Well I know when I took my 280 gal apart it was 5/8" glass and with 2 people its alot easier wit 2 . when I was stripping the silicone off I had my self actually pulling hard on the glass and the other guy was cutting it it actually went really smooth too. from total time it was like 45-60 mins from the time we started to the time we ended..


good luck,

expanding clamp
 

When I did have to cut glass off, an expanding clamp helped alot along with this strategy of pulling and cutting.