So I'm going to brew up some test E 250/ for use in hopefully a 29guage pin for ED injection. (Anything larger that 29 creates scar tissue on me, its just genetic... ) anyway, I ordered EO as I understand it flows better. My question is with a 50/50 gso/EO mix will the EO degrade and breakdown the rubber stoppers? Is any one rubber stopper better than the other(butyl , silica gel, ect? ) I don't want to be injecting rubber into me every day. Thanks