If you are stimulant naive, your doses should be *much* lower to start. Like - use liquid dosing, and do initial test at 1mg, and work up from there. Before my body had practice with stims, I used to bounce off the walls from a couple mg of adderall. Not "a couple of adderall", a couple of mg, like, a quarter of a 10mg tablet. Now I can handle the sort of doses people typically throw around, but with no stim experience, go waaaaay lower. Maybe you will find that you don't have a strangely high sensitivity to stims like I used to, but stay safe.
Interesting about the 2-FMA and cardiotoxicity - is it via 5HT2B? I would believe that - it sure *looks* like a 5HT2B agonist...
I have had batches of "3-FPM" that are drastically different from one another. One batch was absolute fire, I was flying on under 10mg, and the weirdest thing was I could sleep after it... and then wake up the next day and clean like a madman, ie, still high. The subsequent batches, however, were much weaker, and nowhere near as interesting... The good stuff may have been the best stimulant I've ever done, though... So approach with care. IIRC, the good stuff was recreational at higher doses, and extremely productive and functional at lower ones; just perfect!
(and - he's probably doing the weird RC stims because he doesn't do hard drugs and hence doesn't have hookups for the typical drugs, whereas you don't need that to order RCs. Same reason that I'd done half a dozen 2C's and several tryptamines before I ever got a chance to do mushrooms, and why I had done MDAI, as well as 5 and 6 APB before ever laying eyes on real MDMA)
