No problem on mixing the deca and sust in one syrnge...both oil based. You're doing the same stack as Billy Boy and I will be running with the exception of HGH. How much experience do you have? The only reason I ask is because HGH is an advanced drug and from what I understand you should also look at insulin (even more advanced and dangerous) in order to get the full benefits. At least your asking the right questions. I'm sure Mike, eye_candy, and IG will be able to shed some light on this. Good Luck, be safe.
Pete