Remnants after boole cut is made.

 From:  Michael Gibson
3217.5 In reply to 3217.4 
Hi Leonard, I think we may have posted those last messages at the same time, so you may not have seen my other reply above where it seems that your thread object is self-intersecting which will tend to cause problems with booleans.

I'll try to make slightly different version to show you what I mean.

- Michael