LSD: I know the fella who laid them and they're from his private stash - not for sale on "the street". Just hope they haven't degraded too much since I got them. I'm kinda lucky that I've often known folks who lay acid over the years and first got into acid in the early 90s right at the height of the UK Summer of Love/Madchester/free party times. My first tab was 300ug - they used to cost 50p a pop but were so thick on the ground most people just gave them away free. Good times %)
Other than that, if it's blotter from elsewhere, it's mostly down to comparing subhective effects to previously sampled known doses. Also, as the UK isn't too far from the Netherlands, a lot of our tabs have been labtested at some point so the dose is reasonably well known as are pills/MDMA (when they existed over here
). Solipsis can attest to the enlightened drug policies of his homeland, I'm sure 
Other than that, if it's blotter from elsewhere, it's mostly down to comparing subhective effects to previously sampled known doses. Also, as the UK isn't too far from the Netherlands, a lot of our tabs have been labtested at some point so the dose is reasonably well known as are pills/MDMA (when they existed over here
). Solipsis can attest to the enlightened drug policies of his homeland, I'm sure
