Hi Tony, so for making a surface that goes through a specific point you would probably use the "Draw curve > Freeform > Through points" command to make a curve that passes through that point and then use that curve along with some others to build the surface.

Set them up as several sections, like the example in the image attached to this post:
http://moi3d.com/forum/index.php?webtag=MOI&msg=2321.31

In the future I would like to make a command that would fit a surface through particular points, but currently MoI does not have a command like that and instead is focused on making a surface through curves. So in order to make a surface that goes through a point make a curve that goes through that point and then make a surface from that curve.

- Michael