The NIMBY crew are happy that it should be allowed to operate from Bentwaters under the 28 day rule.
Moggy

Or so they say…. I understand at least one of the main protagonists would gladly see the back of the Spitfire too. However, that would be an even more unpopular stance so I suspect that line is not being pushed.

Muzzle plugs?

I should imagine it’s an undercarriage warning horn fuse and test button.

Ditto – we need a MkVIIA for our Horsa cockpit though it doesn’t need to be operable.

That said, thanks to the dimensions on that Smiths drawing we can probably manufacture a pretty good facsimile. 🙂

We have the remains of one with good side plates and both tubes, though cut off inside the plates. It would probably work for you. If I can find a good VII, they’re yours.

We are looking at the left hand side of the aircraft so it points rearward, not forward. This link shows another view with it on the right hand side (assuming the photo is not reversed), though the weight itself is missing.
http://b17warhorse.fws1.com/photo5.html
Here is an old ad for a NOS weight for sale.
http://amppowerwire.com/wwii-signal-corp-trailing-wire-antenna-weight-aircraft-radio-transmissions/

With N-S markings at the end of scale?

B-17 and B-24 are 56″ diameter but with a tread.

Surely to qualify as a cannon, it has to fire an explosive projectile.