Same here.

Photograph everything before you open it. Ten seconds, settles most disputes.

My rule, after years of this: if it cannot survive being written down with the numbers attached, it is marketing.

Same here.

Sorry for the basic question, but how do you actually start one of these diaries?

Written confirmation email after every phone call. Cheapest insurance there is. Five years in on a personal use allowance and it lines up.

If it needs three other compounds to notice, you have not tested the first one.