i dont really use heat for than melting the butter and keeping it liquid. i let the butter do its thing without much heat. takes a while but it works nice. just curious if there was saturation point where the butter can no longer render the oil soluble. like a stick of butter to a 1/4 ounce etc? so far i havent really found a max for say 2 sticks of butter. 1/4 ounce or a full ounce the only difference i have seen really is just how toasted i get and for how long. that and with a whole ounce you have to split it up into quarters or 2 sticks isnt enough to completely wet the herb down. run them thru one at a time, it works fine the butter gets pretty gnarly by the last one and tastes hideous unless you mask the crap out of it but its a damn nice ride.