You do not need to fill in the effects record - there is a box to say if you have taken the gear or not, say 'no' and you do not have to fill in the effects
If you are worried about the postcode, put a different one to where you live but make sure to then post your sample from that postcode
And yes, I have used them many times personally, and have been involved in HR initiatives which have used wedinos 100's of times. It's not perfect but it's still a fantastic resource
Also, your're laughing at the mere suggestion of getting uncut coke in the uk...well I have had had plenty of high purity coke with no active cuts in the uk for, it's just a who-you-know thing as always. I wouldn't take anything else tbh, There is loads of hq coke in Europe in general, moreso than in the USA pro-rata I'd wager. And that's because most coke coming to Europe does not pass through Mexico and doesn't get 'cartelled'
Also, when people are talking about 'washing' coke they mean acetone wash usually, go research it, it's simple. You need anhydrous acetone. It won't remove all cuts (levamisole for example) but will remove many other common cuts. Washing up to crack will not give indications of purity because many of the cuts also rock up alongside your cocaine hcl
With all due respect mate, your increasing facination with all things cocaine gives me the heebiejeebies, If you're a youngster in particular you'd do well to step away while you can, before this shitty drug infects your life to a negative degree that you are yet to truly imagine. The harm it did me physically, emotionally, mentally, financially, socially, in almost every damn way you can imagine over my many years of use is incalculable. Are you even sure you even 'like' it? Beyond the first hit or two in a session, most users don't . Great example of how it hi-jacks your brain eh!
All the best mate