Petrov, is that Polyimide tubing for the whipping? Those look great.
IMHO, considering their cone to cone like shape, the Gaspatch turnbuckles look a lot more like turnbuckles than a piece of straight brass tube. As they are a tad rough, I'm going to start experimenting with trying to fill out the form a little using some sort of filler, epoxy, not sure yet. I just feel that with just a little help, they could really look like real turnbuckles.
Michael