Vixen GP-DX Polarscope Graticule.

[Merkhet]

I have a Vixen Great Polaris GP-DX  equatorial mount with the polar axis scope.

This has a graticule calibrated up to the year  2010.

As you can see from the accompanying photos  various positions are used as time marches on.   The problem is we are in 2017 and the scale only goes up to 2010.

I have looked for graphs and charts displaying the differences between the Celestial North and Polaris so that I could predict future positions, but all to no avail.

I was wondering if I just mentally extend the scale as shown in the accompanying picture would this actually give me an accurate point to align Polaris on?

The drawings are taken from the Vixen  Instruction Manual with my extended positions drawn in.