Thanks thundergnat!

That (second option) is exactly what I was looking for, though I think it looks/works better using the first option (swap start and end cells).

I think I will stick with dragging with the right mouse button, as it seems to be the better method...

By the way... before I reinvent the wheel, is there an easy way to save the $table layout and @buttons to a file so i can import/recreate the layout? I read something about Data::Dumper being able to do that sort of thing, but i have never used it for that purpose.