I haven't used the traditional drive centers in a long while now. Stebs centers came along and while shopsmiths were not something that they worked with at first (MT issues) times changed. While you need a chuck to use them nova now has and has for a while a set of them.
At first I went with the ones Penn St sells I found like most of the things I've gotten from them I grew to dislike them, not the idea just the junk product. At luck would have it Nova came along and my problem was solved. Expensive, yes but so are most good tools. See an example here:https://www.woodcraft.com/products/nova ... oC-2fw_wcB
Better prices can be found if you are interested.
BTW HS shop class we used rawhide mallets/hammers to set centers....... I think at one time shopsmith sold those too but I haven't seen them listed in a lot of years.
It also takes some practice to turn square wood into round and a very light touch is needed to get started so a lot of people stop the work piece because they haven't got that down right. Other solutions are to start the process with sawing off the corners, 4 sides to 8 sides make a lot of difference.