Okay, I've started this to take it out of the server thread but also to try and talk through my thoughts on them...
Energy Collectors
This to me is a glitzy MC solar panel/rechargeable battery/fuel enhancer. I don't have too much of a problem with this as it's almost "real world". If it's empty, connected to an Energy condensor and fully charged I presume there's no demand on the server and it just sits there - is that correct?
Energy Condensors
Now here I'm two minds. I know this is a game, but in real life, this degree of duplication is not available
Granted, you have to have obtained at least one of the target objects in game to get it to do it's work. Want 250 Obsidian blocks in a hurry, drop an emerald to pay and it's the work of seconds. That's kinda like trading so I'm okay with that. Mined and stored 8,000+ stone blocks? Throw them in the box and get a diamond...you've ground them out so I'm okay with that. Put six torches on the wall and swop the light from that for something material like a diamond (yeah, mia culpa) that, on relection, is maybe not so good...you could just not bother trying for the Fortune pickaxe!
What are your thoughts?
Oh, and I think I'll scrap the second collector/condensor that Bart didn't spot in the other room!