Scott, I personally would definitely go with
the 25 gauge if injecting 2 cc at a time, either
that or two injections with 29 gauges, if I was wanting to inject into biceps for example (there is quite a bit of discussion on that previously on the forum.) Including the thigh in your alternation is a good idea. Personally
I have never used a 1 inch in the thigh (or a 1.5 inch) but others have… I use 1/2 inch, 29 gauge 1 cc there. Just personal preference.
Mark, I really don’t know… it’s probably okay
but for all I know, maybe the oil would make the Winstrol suspension gum up. I just don’t know, not having done it.