Original blanks made up of 4 lengths and turned to 3.5" round. Then turned from the 2 single piece blanks a pair of spirals. 33 steps each 3/16" height and 2 and 1/8" diameter turned on 16 offsets to the circle height of the spirals is 6 and 5/16". These are turned steps from the blank, not glued. Comments as always welcome.
See the 2nd view photo from an above angle.
Best from Jeff.