I'll be starting trimix in 2 weeks. Your 90 seconds intrigues me. How do you do that?
If I were to pre-fill the syringe ahead of time, how long can it be un-refrigerated?
Some guys keep filled syringes in the freezer or in the refrigerator. Others who have a home office keep a little refrigerator there with a prefilled syringe in some sort of container. That could be awkward if you have curious little kids at home but it is an option for some.
I practiced injecting a lot. I'm at the point now where I can take it from the fridge, clean the injection site with an alcohol pad and immediately inject by hand. I don't use the auto-injector anymore. Takes 60-90 seconds from the time I start the process, then 3-5 minutes for the full erection.
What you want to avoid is starting from scratch, such as rummaging around in the freezer for the Trimix, waiting for it to thaw, finding your syringes, looking for the alcohol pad, finding the right injection site, fumbling with the syringe, etc. Practice makes perfect.
I have a friend who is single and I told him about Trimix. When he is expecting romance on a date he carries a prefilled syringe in an eyeglass case and then excuses himself to the bathroom to inject when the time is right. As another poster noted, Trimix can be left out of refrigerator for several hours without and retardation in strength.
The bottom line is to practice, practice, practice. When I started I would inject alone without the pressure of having to have sex. I made detailed notes, such as the time of injection, how long it took to become erect, how long the erection lasted, the quality of the erection, and so on. I used all that information to eventually make the process as seamless as possible.
Hope this helps. Good luck!