Thanks. Noticed my electric miner drills were causing the bulk of my pollution so put efficiency modules into those which slashed my pollution massively without dropping output. Also that slashed my electricity demand and so for the first time ever got to the point where solar power was feeding my energy and accumulators can cope with night time. Which led to me using a logic circuit for the first time (in order to turn steam engines off unless accumulators dip below 10%). Not used circuits before, took a lot of trial and error and Googling until I was able to make the power switch work. Wondering what else to use logic circuits on.

Normally only get up to trains and a little bit past that but then quit. Got past train technologies (but not developed a train network yet) and now researching flying robots which I've been reading about on Wiki. Never used flying robots before, they look useful in avoiding a mess of transport belts. But can the robots only carry 1 item or 1 stack at a time without upgrades? If its only 1 item then I'm not sure how useful they'll be until further research is done.