This is my issue as well.
Seems we are in the same boat regarding lots of things jonbana.
But on the quad injection question the op asked.
You find the mid line separating inner and outer heads of quads.
Then you go to the middle of outer head in one of the 3 "X" spots.
Now those spots and about 3/4" circling around are safe spots, but miss those spots, you'll know as soon as the needle hits muscle, as you'll start twitching like you were being electrocuted. But hit those marks. And its like sticking a needle in butter
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