Hi Rich,

> Please please please some form of interactive sectional tool

Give the attached plugin a try, instructions for installing a plugin here


re:
> Is the general workflow make a plane and intersect? Is that what everyone is doing?

I usually draw a line and use Construct > Curve > Project.

- Michael

EDIT: Updated Section tool here (top of this thread):
https://moi3d.com/forum/index.php?webtag=MOI&msg=12071.1