I have used a carving vise for many years. Up until a year or so ago I had what is called a poor mans carving vise. I will attach a you tube site that shows how to make one if you would like to.They are grate because they let you have both hands free and you can turn you work as needed to work on it. The one in the pictures I have enjoyed because it is a bit easier to adjust. It works great with toppers.
This is the home made vise. Like I said I use one for about 20years.