Been using last 4 weeks In prep for hols, I mix 1ml BAC with the vial of 10mg MT2.
I use slin pin 29g with below measurement in mind:
100 IU = 1 ML (Full syringe, ** DO NOT USE THIS AMOUNT, just to indicate what measurements are on my syringe as some.may differ**)
10 IU = 0.1 ML (my current dose)
Max dose I use is 0.1ml or 10 IU(1st bold line on barrel) I do that 40 mins -1hour before sunbed.
If it's your first time I would do 2.5IU (lowest beginner dose, quarter way hot to first bold line) to see how you react, and after a few sessions Increase it to 5IU (half way up,to first bold line) and after a few sessions in that the increase to 10IU (up to first bold line) and that's where I remain.
I go usually Mon, Wed, Thur on sunbed and start off 4mins per session for 1st few weeks then up it to 6 mins last week or so( depends how long/many sessions your doing)