Hi,

I selected all, then clicked join,
then I selected all, clicked boolean union and about a minute later it was done,
worked like a charm.
Win 10, 16 GB memory, Intel I7-4820 MoI V3 trial

Hi All, thanks to all for your various insights extremely helpful - as always the MOI forum a gold mine full of talent.

best regards
Alex.

@death

wow that's interesting. i will have to remember that trick if i run into an issue like this. i never would have thought to try just joining surfaces before a boolean op.

Join actually has no effect on objects that are already solids.

- Michael

Well, whatever the side effect is, it works for me, 52 seconds flat!