I would have to disagree with you, respectfully, of course

. Most blotters range from 50mcg-200mcg. That is a huge difference. My first time, I took half a hit to gauge the strength to avoid a public freak out during my actual trip. Unfortunately, these happened to be in the 50mcg range. Yes, it did suck to have under dosed. But by figuring out how strong the blotters were, I was able to figure out the perfect dose for myself, 2 and a half blotters. Any more, and I would not have been able to conduct myself appropriately... A few months later, I came across some needlepoint that was legitimately twice as potent. Had I taken 2.5 hits of those for my first trip, I certainly would have been overwhelmed. NOW I think 3 hits of those would be a good dose, but I wouldn't recommend that for someones first time.
I think one should always BUY at least three blotters, just in case they are weak.