What happens if you have say a 6 pip that's 4 spaces from the bounrdary of the board. Can you place a tile not using the full 6 spaces of movement?
No, you have to use ALL spaces of movement. So you can't place your new chip in the direction you mentioned, starting from the 6 pip.
You always have to place your chip the exact amount of spaces away from the chip you're starting and counting from.
Hope it helps