I think I have solved the issue of the weapon mount for the fliers.
barrel is a little long, but can easily be reduced... it swivels left
to right but not up and down. I think that's OK as a wargame model. This
mount means its not as low as I thought it might be, so the landing
skids wont need to be as tall! result!!
I found this by sorting through my Old Crow 'bits box'. (yes I have a bits box just for old crow! - although I think it has some Zinge Industries flexible cables, gears and and hatches in there too...)
I have a lot of modular turret parts that I shall be sorting through in order to create some options for the large number of old crow vehicles I own.