I know that with the new Thermal Expansion, it's powered with RF, with a 10:1 conversion ratio to MJ. I'm trying to power some machines from Forestry that use MJ, specifically a carpenter, and I'm sacrificing energy for simplicity. My only problem is that I'm sacrificing more energy than I would like. I've hooked my carpenter up to my leadstone conduits and put some coal into my steam dynamo, and my energy cell keeps draining. I tend to use IC2 because of its renewable power as I'm not yet advanced enough for a stable TE power source, and this is sapping my resources quite significantly, as the carpenter draws energy even when it's not being used. I know it's the carpenter because I've broken the cables and the power stopped draining. My question is this: is there any switch pipe-like mechanism similar to the one from IC2 or any other solutions to save my power drainage? Anything overly elaborate is fine, as I'm that type of guy as long as it doesn't take too many resources; I'm still quite early game. Thanks!