I also rummaged in the 1/2400 scale bits box, looking for some coastal emplacements that bought from the Tumbling Dice stand at Warfare last year. There was one that didn't have any scale specific features, so I've added a trio of Peter Pig light guns with crew to create an ad-hoc shore battery, the sort of thing any self respecting pirate crew could throw up with a few spades, a taste of the lash and some sugar-based liquid refreshment.
On a more permanent basis, I also uncovered the resin model of Chateau du Taureau that I aquired in France a while back, originally as a target for my 1/600th scale ironclads. It will now be used for it's intended purpose, as a coastal defence against English privateers and the Royal Navy, although scale-wise it's a little bit off. Nonetheless, I've stuck it to an mdf base, then used modelling paste, sand and PVA to blend it in, with some Peter Pig medium guns to add a bit of scale effect.