City Commander shoulder weather-vane gun storage - what's the trick?

[Ode to a Grasshopper]

Pretty much what the title says - how the heck do you get the weather-vane gun to store on CC's shoulders, without falling off if you so much as look at it?

I've got it to stay in a few times before so I know it can be done, but I don't really know how - it always seems to take ages of fiddling with it and a hefty dose of luck. All the advice I've found has been "push really hard and wriggle it around a bit", but it fell out earlier today (got nudged as I was moving it to clean the shelf) and I've been trying to get the blasted thing to store for 2 hours now with no success.

I know there's 2 parts to the hole it goes into but they're both just too damn wide. Is there some kind of trick to this that I don't know about?

Cheers btw.

[CBratron]

Blu-tac.

Or do what I do and keep it safely stored in a Tupperware container with other loose bits.

[kup]

You mean so that it looks like this?

[Ode to a Grasshopper]

Pretty much, though I usually flip the barrell down so it doesn't stick up quite as far.
For the time being I've just looped an elastic band around the back, but if there is some kind of trick to getting it to stay securely on its own I'd really like to know it.

Sorry if it's kind of a dumb question, it just irks me a bit is all.

[kup]

All my toys are packed away as I had painters in but will be unpacking them during the week. Once I get my City Commander out, I'll give it a go and let you know.

[GoktimusPrime]

Mine holds the vane gun in his hand. I have a spare pair of G1 Ultra Magnus launchers connected to the shoulders (cos the G1 launchers are also 5mm compatible ).