Hello, I find that I sometimes have trouble with ghosting at the bottom and top of my tumbler. So I have switched to using the flat edge tumblers, which allows me to successfully sublimate my tumbler completely from top to bottom. Taping technique is still very important. And image size is also very important. Best wishes!!! PS. I love your positivity and professionalism along with the educational component of your tutorials. Thank you for sharing your knowledge and expertise.