oh, and yes. i will be using a glass-and-brass spg, diligently monitoring it, and turning around at "half plus 300" psi. any off-hand recommendations on a good brass-and-glass SPG not sold through xs-scuba or oms (overpriced) would also be appreciated!
Check HOG...they have a 2" and a 2.5" brass and glass SPG that is solid and priced really well. They also have a 1.5" brass and plastic SPG for deco bottles that works great and cost 1/2 of others. Check these guys: http://www.piranhadivemfg.com/shop/?shop=1&cart=80962&cat=106