The one thing I would like for UltraCube, is a 'cube uptime' tracker. How good/bad is my current layout? is it worth tearing down as my cube spends too much time traveling or is it not actually that bad?

Right now my downtime seems to be more because of inserters than travel time, but when loaders ...

B5 perfectly matches all the cooling towers I ever see in use; it's the first thing that comes to mind for 'cooling tower'. Sorry if you don't like it, but it's what the iconic cooling tower is, for me.