I know for damn sure I acquired my temps from experience.. Google is notorious for letting me down in my oil-making research..fuck the first few links are always some fool using pvc and duct tape and cheesecloth and Ronson tane...haha
Google usually is a persons best friend, but you gotta know what to search for, when brushing up bho skills.
But, there is a good wealth of knowledge on the intrawebz, just don't believe what is written, rather use the info provided as a guide, but not ruler of thumb.
Making oil in any form, wax, honeycomb, shatter, budder is very difficult to obtain, until one has experienced the procedure through repetition.
Too many variables held within the plant matter, hell you could take one whole plant, split in half.
Run half in one tube, half in another.. Use the same tek, same heat, same everything, and one run will shatter, one will wax.
Each flower, each leaf contains variable amounts of essential oils and waxes.
One must be able to visually recognize what variable may be occurring and be able to adjust your tek to accommodate the variable.
Sorry, lots of caffeine this morning...lol