[AJames]

Best to use a Hexagonal Diaphragm to improve telescopic resolution are several clever techniques originally designed to measure close pairs. This method amazingly destroys the Airy disk completely!
A mask cut to be a six-sided hexagon is placed over telescope aperture, creating six very bright sparks of light are seen from the central star which is in part the distributed light within the Airy Disk. Resolution here is improved about 15% to 20% compared to without the diaphragm.
Separation of the stars can be judged either by placing the faint companion in one of the six dark zones, or estimating the space between the two light rays from both components. This tends to work best for stars with some difference in magnitude, as the component of such pairs usually lurks with in the Airy disk itself.
You might have to do some trial and error with the exposure, and making small rotations until you get the best possible position for the Pup.
This technique as old as the hills, and works well.

Make sure you tell us if your successful!

Regards and Good Fortune,
Andrew