semi broke-through yesterday (from no more than ~30mg). alone and without music. as soon as I was able to I rushed into my bed and rested for another 15min in fetal postition. so I recommend music for the comedown to help find reality/yourself again...it felt as I got lost again lost again lost again yesterday...
the dose was low though. maybe it's me but I feel like doses between 25-35mg are mostly uncomfortable. the ego is not dead but rather wants to be and starts silly games. makes you feel like the only person in the universe on the comedown. just doesn't feel complete. (OP: never ever underestimate DMT. even doses around 25mg are probably more intense than anything you did/could imagine before)
but I had spectacular experiences with ~30-40mg if combined with n2o. shoot yourself to the moon with the dmt. let it settle down for a few seconds and then spread yourself all over the universe with lightspeed by adding n2o.

bets thing I've ever done.
and, Lucid: I recommend 'the machine'. the dose into hyperspace seems to be smaller than with other smoking techniques and - at least - I have absolutely no problems with harsh smoke, coughing etc.
and usually one toke gets it all in. the second is usually aborted due to inability anyway.
smoking DMT right has to be learned imo.
another point:
yesterday I was clearly fully immersed in hyperspace (which is a distinct difference to the 3D visuals on lower plateaus ime) but I wouldn't call it a breakthrough as there was no sense of cosmic love/oneness/presence of god and so on.
I think with DMT there are the plateaus:
body high, 2D CEVs -> body high, 3D CEVs, OEVs -> hyperspace. no visuals but crystal clear visions. no difference if eyes open or closed (at least I tend to keep them shut as the intensity feels so unbearable..

) -> ++++, pure love, god; at this point visions become abstract archetypes ime....
does anyone agree?