I suppose I support this, although I don't know how easy it would be to implement and how much the community would actually use it. I think that once the player has the experience from getting to the point of having mk2+ they're pre-placing power poles in their factories or setups. I find that most of the time that I'm actually creating new power poles only from wire, I'm actually just connecting one source to another from a long distance and I wouldn't benefit from the ability to choose a higher pole level anyways. With all of that being said, it's not a bad suggestion, it certainly wouldn't hurt gameplay in any way.