I've done 1p twice, at 100 and 125 mics, both times sublingually. Both times I had the familiar comeup like 25, but with maybe less tension than I remember with 25. At 30 minutes I had that "something's about to happen" feeling and then by 1 hour I was definitely coming up. Not much difference from what I remember LSD-25 being.
One thing I did notice the second time, and wife noticed both times she did 1p was a smaller "mini-peak" at about T+8. Both times she did it she said "I think I'm getting high again", and the second time I did it I definitely noticed it too. I have no idea if this is a real or imagined phenomena.
My flesh moves, like liquid. My mind is cut loose.