I have been making long neck bottles and vases. I have been unable to get them to stay put when trimming. The bottom of the vase is larger than the top, so they tend to not hold steady even if I use clay to hold it still. I have thrown a "chuck" But since the clay is soft on the chuck, it doesn't seem strong enough to keep the form still, top-heavy when upside down. I also have trouble with the chuck clay sticking too much to the pot that I am trying to trim. I have tried using stoneware to mount the white porcelain so it has a stronger clay body to hold it up, but I have the same issues and it leaves ugly brown marks on my porcelain what require scraping and sponging off….
Does anyone have a solution?