The tall insulators on he left are High-Voltage Bushings and fit on top of the transformer. This is where the Primary voltage system feeds the transformer. The rest are various forms of Utility Pole Insulators
When 3d modeling for printing at Shapeways, currently the best material is FUD/FXD. These materials have a minimum detail of 0.1mm and minimum wall thickness of 0.3mm .. what this means is that if you look at the thickness of the bushing and insulator disks .. that is this minimum ‘wall thckness’. I think that you could get something closer to scale by either photo etching or laser cutting the disks – but since I don’t etch brass or own a laser cutter the point is moot (for now at least).
The renderings show both the O scale and HO scale sets – in reality the HO versions are almost twice as thick as the O scale – again the 0.3mm wall thickness limit.
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