fancy shakes aside, I think to make slin work best, you need to eat CALORIES.
To just simply this, you could just take a dose of humalin R post training. It will cover your next 3ish meals and allow nice recovery.
I like intra workout drinks, but slin kinda pushes me to over consume alot in a short period and that may be hard on your stomach.
Big eating/cals come naturally to me post training, the slin will make you hungrier and since I like nutrient timing, post training is a good time as it just speeds everything up.
To gain actual size though, 2 shots are needed.
So in the end, slin usage means being close to food and being able to eat it when that shit peaks as humlin R is like clock work, peaks 2 hours later and I better have a high calorie drink or food ready. Or the symptoms hit and you just feel like you're fucked if you don't eat. It happens to everyone who dabbles in this, just try not to have it happen on a date as I did once, lol... sweated my clothes out, it was totally disgusting, winter time as well so I froze after, fuck...