The buzz keel is my favorite mold now, and I have both weight versions. You have to get them real hot, but I like them a lot better than the older style. I still pour the older style too, but not as much now. I find the 1/4 oz to be the toughest to pour, as I prefer a bigger hook, but 3/8 & 1/2 oz I have few issues with, but they do need to be very hot.
I pre-heat my molds and keep them hot with an electric hot plate.
BTW the Style H spinnerbait mold makes a good buzzbait too.