I've used the Diamond engineering holder for some time now and it is my go-to holder. It's not the end-all for everything, still have to make specialized bits from time to time but it works well. The added advantage is that if you do something stupid, and jam the bit in the work, the bit just slides down in the holder rather than snapping off or breaking a gear in the lathe head. Gives a nice finish if I do my part with using it.