This a very cool addon and I'm in love with the water physics. They need work but there's so much potential. I've spent most of the day trying to drain various bodies of water by placing pipes with drain covers on the bottom. It's something I'd been dreaming about since the 1.5 versions of GT
I know that this is a general ic2 addon, but would it be possible to tweak the energy capacity of the handpump with GT installed? You are using batteries with 200k-400k EU capacity to get a 30k EU tool and it doesn't really make sense. I'd love it if drain covers could be tweaked to drain water sources from flowing water like that handpump, but it might be asking too much.
Edit: Just realised energy, etc. are configurable