Wow, i just took a 75mg (55mg+20mg redose half an hour before peak).
Just to give you a perspective, this erowid dosage chart corresponds perfectly to me:
Treshold: 2 - 8 mg
Light: 5 - 10 mg
Common: 8 - 15 mg
Strong: 10 - 20 mg
Heavy: 25mg +
My usual doses were always in a 10-15mg range, and that always delivered mad visuals, geometric patterns, objects feeling 3D, oilpaintings and "persian-carpet-bombing" for a long time. My friends also got fucked up on those doses.
Well, yesterdays trip was definitely in a completely different ball-park. I was tripping balls for 7 hours and I'm so incredibly glad it wasn't a "bad trip", because it was so intense. I had some short episodes of panic thoughts, but thankfuly they subsided very quickly.
Onset was fast. T+12min and I already started tripping. Probably thanks to the fact that I fasted for the whole day, before getting myself lost in the spiritual ritual of mother earth.