Took a bit of cotton and added about 0.2 mL water to saturate it then 0.5 mL of the 4-HO-MIPT solution. Drew it up into the needle, sterilized the area, got ready to put it in and decided I wasn't going to do it.
I realized that this isn't a bridge I want to cross right now. Even threw my rigs away. Unfortunately, this means I wasted my last bit of 4-HO-MIPT, but in the end that will probably be worth it.
Plus, I'm pretty sure now that the 4-HO-MIPT didn't completely dissolve because there were tiny almost undetectable particles floating in the solution.
I might do it some time in the future, but the fact that there was still that suspension kind of made me very unsure and is what tipped my decision to the side of not doing it. Of course, the solution in the syringe was completely crystal clear, but I just didn't feel right about it. Plus, it would have sucked if I went through all of that to inject it and have no effects because all the undissolved (what I now assume was) freebase was caught in the cotton.