For Viper and Raider, I tried a 3D printing, but my order was canceled by Sculpteo (a Shapeway like here in France) as being too thin !
I then tried an easy way with a tiny papercraft models, but the result did not convince me, so I did go with scratchs, to duplicate with resin.

In scale blueprints, generated to scale by Sculpteo, have been very helpful here.

The viper is really easy to do, following modules of the papercraft model, so based on rods, and square section evergreen strips quickly shaped.

For the Raider : it was also finally fairly easy, following the scaled blueprint. I used spare grooved parts for the cockpit, and clamp strip for the engines housings.

Here my tiny squadron, ready for molding.