I use MiFlex as well, but only the lp hoses on my reg, octo, and inflator hose. The MiFlex hp hoses, that you are using on your spg, are skinnier, and from what I've heard can be prone to blowouts: http://www.scubaboard.com/forums/xs-scuba/343500-miflex-hp-blowout-eeek.html; Miflex HP hose issues
Good to know! Thank you.