Old Bob, First, welcome to the forum. The kits these guys are talking about, are not the kind you see in your big box gun store, but rather a collection of parts, and a stock that is generaly shaped to a particular style. The main thing is that the barrel, and ramrod channel is cut. These are probably the two scariest things to do on a blank, as it can go from a $100 plus piece of wood to kindling in a blink. Just my two cents. PS I myself do prefer to build from a blank, but I do have them sent out for barrel, and ramrod cutting, and I know a number of pro builders do also.
Bill
Been there, done that, got the Bandaid to prove it!