Thanks Michael :)

Yea I've been using the Distance method - takes a bit more time in most occasions, but gets the job done.

I was thinking about what you said...

2 possible methods for it to work...

a) grid snap - where it snaps to the grid of the current viewport

b) unit snap - where it snaps in 1 unit increments, on the plane in which the tool is working (1 unit = 1 grid unit, but the rotation and viewport grid doesn't matter here)

P.S. am having fun designing some space craft for an upcoming game - will post some WIPs when I get them ready :D