Note that with Turns at 2 or more, increasing the Grow_Shrink parameter to more than 1 or more, creates a HUGE spiral,
and any pre-existing dimensions get first smeared, then vanish. Pre-existing curves become jagged, and can disappear also.
This is outside of the slider range.

This also occurred with logSpiral4, and occurs with both MoI4 and MoI5 beta.
May be related to circle centers going away, as in another topic ?

MoI does not crash.

- Brian