A bit about the gun build - many parts were used - everything from the spares-box

Barrel is made up of section of tapered barrel from an old Nitto kit, joined to a section of a pen & joined to a breech-block from an old Tamiya Tiger-1? with a metal ferrule from somewhere. Muzzel-brake from an old Italeri Elephant? with new front piece. Under it is a length of plastruct girder with bits of Tamiya 2cm gun parts & half a barrel (railway accessory) on its front. Various bits added to the breech-block so it looks like the photos.
Its now 97% finished, only have to do the tracks & then the cam scheme.