I did read the report above before my original post, but he did not mention what his first dosage was, only what his attempted redose was. I'm titrating carefully after all the horror stories I've read about the dose-response curve. After my incident with phenazepam, I'm very wary of these long acting drugs. I wound up severing the muscle in my thigh and spent 2 weeks in the psyche ward after a 100mg dose of phenazepam x_x Well, I dosed a small amount while drinking vodka and then blacked out and redosed the rest of it.
But I did IV about 60mg MXP within the course of an hour. It did not make me feel dysphoric and stupid like the MXE often did, but there are very few IV experiences shared on the web so I figured any data would be valuable. I think I did say I would need triple the dose in order to hole, which would be about the dose you're recommending. Though you needed propylene glycol to dissolve it in water, so I assume you had the freebase, which has a different potency than the salt due to the added molecular weight.
I did another 30mg IV this morning with my suboxone and I'm feeling pretttty nice. My legs are bouncing a lot so I think this one has a lot more catecholaminergic activity than some of the others. While on benzos, I become a speed freak, but without benzos, I can't even touch a cup of green tea without jitters and anxiety. So it's possible that if I try this stuff while not on valium, I might have a much less pleasant experience.
It is worth noting that I'm on suboxone so unfortunately any opiate effects the drug may have will not affect me. So there goes some of my euphoria

I also take gabapentin for benzo withdrawal. However, I'm also currently taking valium so I'm not withdrawing, but my doc doesn't know that. I hear there's a long half life and you can piss for PCP even 10 days later. I'm going to have to be wary of that. I don't think I will be doing any more experiments between tomorrow and december 8th.