Hi Michael,
Thanks for explaining the Boolean operation and yes reducing the amount of facets to the minimum will help.
Re: Reversing helix.
>Do you need this to be fixed in order to proceed or is the solution you came up with working ok?
I think it would be good to have a check box the same as in the helix creation to save confusion as
normally these screws are in pairs.
Regarding achieving a smooth scroll I have been lofting the facet edges.
Is it better to rebuild the bottle profile so there is only one seam for the Boolean operation and
to give a continuous facet edge to loft ?
I've attached photo's as reference to show how to easily select them.
Again many thanks have a nice weekend.
Barry