I'm mostly ok with default texture, but these machines looking usually exactly the same and without visible orientation drive me mad.
So, suggestion is: different textures for transformers and storages (just different tint will do even) and oriented textures for sides (with output or higher-voltage output being the top), so it is possible to say where top is when top is covered by cable or other machine.
if someone make this as texture mini-pack, it will be good too.