You raise 2 issues here that I think should be addressed:
1. Shooting winny. This is probably not in your best interest. Winny is reconstituted in aqueous solution, with a higher chance of getting an infected pin site. Also, winny works just as well when injested orally, with the only difference being a shorter half life (about 9 hours). This can be resolved simply by splitting the dose and taking it orally twice per day. Again, I see no reason to ever shoot winny.
2. Calf injections. Your best bet, if you choose to inject your calf, is to go medially (inner) rather than laterally (outer). In the lateral calf, you will have a higher chance of hitting the peroneal nerve, a major motor nerve to the ankle dorsiflexors and major sensory innervation to the dorsum (top) of the foot. Pin the medial head of the gastroc at it's bulkiest spot (this will vary based on your particular level of calf development).
Also, you raise another point. You say that it is a myth about whether spot injections work or not. My opinion on this is that, yes, they can add "size" to a muscle belly if you inject synthol, essentially the oil base of AAS. You can decide for yourself if this increase in "size" is visually appealing or not. Personally, I don't think so, and I think a swollen, inflamed, oil-filled muscle is aesthetically unappealing, and goes against everything a bodybuilder should want to achieve, but that's just my opinion.
To think, though, that this could be achieved with an aqueous injection is pure nonsense. Unless of course you get a nice big fat pus-filled abcess. Then, yes, the "size" you so crave will be achieved, at least temporarily until your calf is either surgically drained or your lower leg is amputated

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