During my cruise now, I am running titters test cyp (0.4ml)in mct along with his primo e (0.5ml) in mct and leftover primo e (0.5ml) in gso all together in 1 syringe, every 4 days. During the 1st couple of weeks, i had some pip (2 on scale of 1-10 being death) as i was mct virgin. Now after a couple of weeks there is no PIP. I know this is good answer since i am mix of different compounds but it is another good check mark for titter.
I do nowadays warm up the oil before I inject before I inject. instead of heating the vial(s) full of oil, I withdraw the required amount of oil from different vials and inject into an empty vial to place on the coffee cup warmer.