I now do this in a single cup coffee plunger. It has little stainless legs to keep the bottom of the pyrex container of the bottom of the saucepan and it has a built in plunger to separate the gd from the used bud. With the tall and narrow container, (importantly made of fairly thin glass) in a small saucepan, it is very easy to keep the temperature just on 75F. I just keep adding a few drops of 151 whenever it looks like getting too hot.