Got the AT-43 models in the mail today.
Sadly, the Cobras are a tad too smal for the conversion I had in mind and way too big to sub as something else. Kind of a bummer. If I had an extra devilfish to hack up it might be worth a try, but I'm not going to sacrifice a perfectly good model for an iffy project. Maybe I will turn them into looted wagons for my future dread mob themed army.
On a happier note, the Karmen K-fighters seem to be excellent stand-ins for Broadsides. A bit of recoloring and additional missile launchers will make them good to go.
Anyway, back to working on my Necrons.