Ok, couple of questions from the newbie.

How do I only show the outer profile of a drawings? I.e. when you have complex surfaces, the "Hidden Lines Removed" option still does not remove visible lines accross surfaces. If you check out my first image I'm sure you understand what I mean. I just want the outline of this assembly.

Secondly, I have lines which I want to see but cannot where a shaft with clearance enters a hole. Infact, the shaft has a step increase in diameter and butts up against the edge of the link seen in the picture. How do I make lines here?

Thanks in advance for any advice.