I considered the pull-up type "chocks" on the bow of my 23' when I installed the other flush mount hardware.
Because of the curve of the hull, they would have had to been mounted several inches in from the edge to give enough clearance underneath for the internal mechanism. This rendered them ineffective as a chock and frankly would had looked hideous
I stuck with the flush mounted Nav Light, single pull-up cleat. The chafing rails have been bent horizonaly to match the same bow radius curve.
