On Tuesday, September 4, 2018 at 8:53:00 AM UTC-5, wrote:

As to rocking chairs, one leg longer and/or the angle (front to back)
of each the rockers, needs to be the same exact angle, otherwise
the rocker will creep sideways, across the floor, as one rocks.
Sonny


... here, all along, I thought it was the whisky ! :-)
John T.

It is the whisky, during the build and the rocking.

Sonny