@ Von Manteuffel
That is a very good synopsys of the issue at hand. Thank you for the very well thought out post.
@ Dustyboats
Damn. You've just confused me with all the math.
I guess I maybe lucky in that I can calculate these things in my head without actually consciously trying to. I can usually plot my interception course by just judging the angles which present themselves on the plots. I suppose this comes from years of playing Snooker/Pool, hmm I guess that would be geometry:hmm:. However, from your post I can certainly see how this new addition can be quite daunting for some players.