I am new to injections. Been rotating 6 spots (left and right) on my body (shoulder, quad, glutes). I like the shoulders best. Been using 25G 5/8 in for that location and 1 inch for the other locations. Is there any issue with injections 3x a week just using and rotating shoulders? Any recommendation in needle size for this? I feel comfortable with what I have now, just wondering what you do for shoulders IM.