Seriously, any one taking AL-LAD, 1-P-LSD, ETH-LAD dosed on premade blotters have absolutely no idea how much they are taking.
The blotters aren't evenly laid, even on the same sheet. That's the whole point. Two adjacent blotters can easily absorb a 50-100 ug difference by accident. In my opinion. It's very small quantities we are talking about here, and you would need to spray it on, or place single drops with a micropipette to get totally exact doses per blotter. Using soaking, which must be how the official blotters are laid as it's the only viable method for massproduction, will always cause hot/weak spots.
I am completely sure that if you have the powder, and use a laboratory grade ug scale and volumetric dosing, then you won't get as big a variability in potency as people are finding with these novel lysergamides. Obviously, set, setting and internal body chemistry is also factors, but uneven distribution is in my opinion the biggest culprit.
Don't get me wrong, most of the blotters are approxemately the same strength, but some are clearly weaker, and some clearly stronger, even on the same sheet.