Hi Rob
Sorry I forgot to answer your USB question in your thread.
I love the USB DMK. It can do 60fps no dramas, to both my internal HDD and external HDD. The 12" is also great, gives me more image scale and light. It's a beast on top of the poor EQ6
The USB DMK is also great because I don't need external power for it, or any PCMCIA card etc.
The seeing for this image was probably closer to 5/10 than 4/10 but I know it was definitely less than average especially for being at 74deg altitude
Thanks for your comments.