thanks for the replies,
The heavy duty windscreen mount looks good.So it sounds like they will work where there is some curvature such as the side window and more so on the windscreen.
The velcro also sounds good but didn';t want to leave marks behind as its not my aircraft.
Bern444, The audio side sounds interesting, so a 120k resistor in series on these leads is enough? You'd think there be a big market for a device like this , if one was available comercially, it would sell like hotcakes - obviosuly don't want to damage the mic input on your camocorders. As I'm pretty rubbish as anything electrical, might be something I could ask an avionics expert to 'knock up'.
re the sponge, yes perhaps worth a try.I'll get my sticky back plastic, toilet rolls and washing up liquid bottle out!
thanks all for the responses, if anyone else has suggestions, shout.