Exotic Cigars
Just as the folks above referred to: The CSUA, PSI, and LazerLinez Bushing are close enough. I turn all barrels slightly proud of the bushings and then add a radius. Also some of the Cigar components are slightly rounded which makes them more forgiving.
Never a bad idea to use calipers to obtain more accurate measurements; that is what I did.
Separately, I bought a bunch of those kits in various finishes the last time they were on sale and was very pleased. I was going to buy another 12, but want to use up more of the dozens of kits that I have.
Here are several that I made from that lot of kits. Happy turning!