Well I ordered some 464 (I've been using 415 and having HT problems.) If AH/RE is getting "excellent" or "strong" HT from the scents I've bought, I shouldn't be having this much trouble. They do use a zinc wick, I believe, when testing and 464. I don't add dyes, use Premier wicks (upped now to 780), use 6, 7, then 8.8% FO, and still not as strong as I want. Last batch has 10% FO which will be ready for testing in another week. The only thing I haven't changed in my testing is the wax. So figure it is time.
GoldieMN