Thanks, I'll check them out. It seems like they mainly talk with people that have vested interest in talking about their companies but if they ask tough questio

Thanks, I'll check them out. It seems like they mainly talk with people that have vested interest in talking about their companies but if they ask tough questions then I guess it's ok. I just can't stand passionate talks about e.g. cement block-based gravity energy storage when in reality this idea would not have a chance of working. And a small $3000 prototype is not a viable proof.