RotoRouter,
Why worry about changing the gecko physically??? If you use a "standard" controller like TCNC or Machx, simply set the feed rate to a different speed.
If you are moving in only the X direction this time, set it fast say 80 IPM or whatever and when you are doing the wrap, set a slower speed and the machine will reach the end points at the same time (if I read your scenario properly). To me, the second would be simular to "cutting a thread" except you are winding the filiment on top of the piece. From a starting point of X0 A0, you might issue a command of G01 X5 A1800 F10 which would give you 5 turns spaced at 1 inch helix. Obviously, I have pulled numbers out of the air for this example.
Art
AKA Country Bubba (Older Than Dirt)