I use C-3 and I have tried just about everything (except the heat gun) and I still have large craters/holes. I have poked holes, done the re-pour thing, reduced the pour temperature......and everytime, I have a pretty creamy top but with craters/holes. I've even used the blow dryer on low and that helps but it's not the same. Is there anyway to pour and not have to go through all of this? Help!!!!!