. . . that I've found is comp.cad.solidworks.
Just bragging on you guys. I posted the same message about estimating engineering time for machine design projects on six other newsgroups, and guess where I got the most answers AND the most helpful answers.
Newsgroups I included, and where one would expect to find people who would be happy to reply, as well as helpful replies:
sci.engr (no replies) sci.engr.control (2 replies by the same person) sci.engr.manufacturing (no replies) sci.engr.mech (2 replies) alt.mechanical.engineering (no replies) comp.cad.pro-engineer (no replies -- potential respondants too busy dealing with arrogant tech support to answer)
The replies that I did get in those other groups weren't really helpful, save perhaps for one (only slightly helpful). Offhand I'd have to say the comparison with comp.cad.solidworks (7 different respondents with 14 different responses, most of which were at least somewhat helpful) shows a level of professionalism unparalleled in those other groups.
So -- cheers to a bunch of highly professional people . . . YOU.
Best regards to all, Mark 'Sporky' Stapleton Charlotte, NC, USA