For a spiral on the 3 inch tower I used the floor tiles from the mold.  I just glued them 1/2 way across the tile below and made sure the center point was even.  Worked fine.  Just another option.
Snitchy sends.



That old chair in the corner has my name written all over it.  Wink


Tip: A bottle of scotch and two aspirin daily will greatly reduce your awareness of internet trolls.
http://snitchythedog.blogspot.com
Molds
40, 41, 42, 43, 45, 46, 51, 53, 54, 55, 58, 59, 61, 63, 65, 66, 70, 74,  85, 90, 95, 204, 210, 250, 278, 279, 301, 302, 303, 321, 325, 326, and 327