I like dinkers and have a few (5-6) and that is a great pickup. But I might suggest a different breeding path. Don't pair it with things that are "like" it. Pair it with something that strongly reacts to the gene you think it is. For instance, Stranger and Lesser react, producing a easily identifiable snake. If I had a CH import I thought was a Stranger I'd test that by breeding it to a Lesser and see if I get the same reaction. If you think it is a new line of Cinnamon then breed it with something that makes a distinctive Cinnamon X snake. Then if you don't get that you rule out it being a Cinnamon.