In the preview images I used a bunch of spotlights and composite nodes to add a glare effect (none of which are included). Three materials. Some items are made with multiple objects, some aren't. Blender's bevel modifier may have created some coincident vertices. 7 gadgets, 28 objects. 3 materials. --OBJ File-- Comes with working mtl file. You will have to re-make glow effects. Objects not named. Origins not in right places, you will probably want to recalculate them. Edge split (which involves using multiple vertices in the same place) has been applied.
--Blend file-- Objects are named d1main-d7main with part names starting with the d+#. Meshes not named Most modifiers not applied.