cadcam,
As your Gibbs questions surface don't hesitate to post them. I've been using Gibbs about 3 years full time. (That's well over 7000 hrs. ) There are very few questions I can't answer, however, I am NOT a post guy. I have also had the opportunity to work on Gibbs, with someone who used to work for Gibbs doing testing (a1 thru beta) and post work. I have had the chance to learn things that "they just don't teach" as well. Being an instructor you know what I mean.
Also I'm just starting out with MC and will probably be shelling you with MC questions through this site as they come up.
I speak fluent Cadkey as well so learning MC should come quick.
I can see by my first experiences with MC, that anyone switching from MC to Gibbs may find themselves in a frustrating fog. It's mainly a matter of learning HOW to use the "lean" selection of tools. It is ALL there. (some don't think so) You just need to know
HOW when you don't see a button to do it

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MasterCam seems to to have a lot of "secrets" too. There have been a few times I was hunting around for something and found all I have to do is riGht or left click a mouse button and THERE IT IS! hiding underneath