That's been my prefered method for about 35 years. Soften brass tubing with a blowlamp and it bends into a nice horseshoe shape with the .027" cable inside. The partial flatening of the tube is almost enough to secure the leadout, even with wrapping.
I still wrap them, but in scrapping out some old systems, it was virtually impossible the pull the wire out of the tube, even with pliers and a vise. Both ends, bellcrank and wingtip.