I didn’t shoot the whole process of making the crest rail for the bedstead. But at the nearly-last minute I thought to get out the camera. The crest is a separate piece, sitting atop the integral top rail of the headboard.
I carved the design first. Then used a small bowsaw/turning saw to cut out the profile. I shot a couple photos during the clean-up of the sawn shape. The outline I cut with the V-tool as part of the carving. Then sawed pretty close to that.
I used whatever I could get in there with to smooth off the sawn bits and bring the profile to its final shape. A couple of spokeshaves, chisels and even a bent gouge.
Here it is test-fitted. The crest rail is 56″ long and 7″ high at the center.
And a detail:
I chopped two mortises in both the top rail and the crest rail, for floating tenons to help align and secure them. Part of the inspiration for it is the crest of a wainscot chair I have made a few times. I assembled the most recent version of this chair back in April, https://pfollansbee.wordpress.com/2017/04/26/wainscot-chair-assembly/
I doubt (well, am damn-near dead certain) that the original chair(s) had no floating tenon between the top rail and crest. I have made and lost some crests by using the typical period construction (nails and sometimes a wooden pin between the parts) – so for the bedstead I have used what you see pictured in the chair photo here.