When stacking use 1 pin per compound or ?

[xxblazenlowxx]

It’s not the mixing in the syringe that’s the concern, that doesn’t matter, it’s if I draw air and have to push back. I don’t want to push water into my oil or vice versa

Push air out after pulling needle from bottle?

A drop of air isnt bad either, if there no air in syringe when your done injecting the needle is still full of gear.