Hi Gary
I fitted a Tak x1.6 Extender to the Mewlon 210 to give me F/18.4 at 3864 mm focal length and managed to rattle off 360 x 15 sec exposures tonight (13th June) before wispy clouds moved in.
The attached image is a full res crop of the region of interest.
The seeing was pretty bad so no further detail was really revealed.
Cheers
Dennis