First we sit down and talk about WHY,
then we find a way to create a lesson plan that shows you enough to think Why Not use C3D?
I started in this field in 1978....and later autocad 2.x, so I understand many of the challenges you are faced with.
Many of the companies I have trained move forward easily, some need a little extra guidance.
Your client needs, and project demands are unique, however I'm sure they are not insurmountable.
A recent trip to S.D. had me drag three teams of surveyors outside into a blustery snowstorm, to show them that YES line coding can and does work, and that YES I would survey with them to make it happen, and YES they could make it work for them. After about 45 minutes at -2 we had our data, and yes it all worked, and only at that very moment were they ready to commit to C3D. I think some of them respected me for that, and think a couple got 'hurt' over my method. If that is what it takes, then that's what I do. At the end of the day, those guys may not have liked me, however they can now use C3D, and that means I did my job. They can like me later.