I think that usually artifact creatures get +1/+1 and plain old artifacts get charge counters. But apart from needing another counter colour, there's probably no harm in mixing the two up. If this didn't have : you could probably cut out the part of the second ability Energy Chamber costing as it does, so you could instead probably cut out the ETB tapped part?

You know, I just gone done talking about uncommon lands with 2cc activations on the card Orbital Command. I'm a bit too tired to evalutate what's fair right now, but there's a list of cards to compare it in bullet points on that page.

Hi Guys. Thanks for the input
jmg - really interesting talk on the uncommon 2cc activation lands, it helped a lot.
Vit - Changed it up it's now worded the same as Energy Chamber which is what I was originally going for and has lost ETB Tapped.

I like it. I'd play it in several artifact-heavy decks. And certainly any deck with a Lux Cannon :P