Thanks for the help!
Right now I don't need to do any more than one per week, but I will be doing Tren (EOD) this summer so I am trying to prepare my injection sites to minimize scar tissue.
About the calf... I first tried my glutes, and could not do it. At that time I didn't know I could pin my quads. So that time, I pinned my delt (which was pretty painful for a few days).
Next I didn't want to do delts again, and I again couldn't do glutes and didn't think I could my quads, so I pinned my calf. I wasn't doing it for site growth. Incredibly this injection caused STRONG pain for almost a week, and now 12 days later it is still tender.
So, no more delts or calves for me. I hope I will be able to rotate between quads and glutes, guess I just gotta keep trying!