I used them for two cycles I believe. 10mg squares, maybe 2-3mm thick. I thought they worked okay, but for whatever reason, I preferred the old pinks. Lab assays posted at the time showed them to be within ~2%.
I never heard of any "kat" back then... I always ordered from who was, at the time, toted as being the originator, located in thailand... he was around in the mid-'90's or so, and rather prevalent as a name on the boards, so I'm rather unsure of the originator of this interesting product. Never heard of anyone resembling "kat" back then, unless he changed his name (as a few suppliers have been known to do).
:coW: