Yep.
Friend of mine did 15mg Miprocin (fumarate i do believe) so it was a plenty mild dose, he wasn't noticeably fucked, very happy, very lucid, not jibbering random shit.
Coming off his peak he insufflated ~20mg MXE, and within 20 minutes he was properly gone.
A consistent effect for him on MiPT trips is a vibrational frequency that pervades the body (enhanced by music, other physical stimulations), and he said that the vibrations basically became too strong. Seemed like he was ready to burst with whatever energy, looked very uncomfortable and pretty ready to wig out, wasn't making a massive amount of sense and just generally looked like a bad time. I think it would've been maybe nicer if he was in a more comfortable environment (i.e. a free house, outdoors on a nice day, not at night in the winter) and with others tripping hard/or just no-one at all, sober company is often pretty lame when tripping.
another friend did ~20-25mg MiPT, then railed 30mg MXE (not sure how close to peak he was, no idea if it was before or after) but he ended up wigging out and hiding at his missus' place having her look after him/making sure he's not dying or w.e.
MXE doesn't seem to lend itself well to 4-HO-MiPT, although neither of them had any dis+psy experience before and were still semi-novice to MiPT+MXE. If you're going to do it, remember to start fuckin' small.
If i was doing it i'd go for ~20mg MiPT, wait until i'm getting comfortable at peak/plateau and then start small with no more than ~15mg MXE insuf.