Partial crosspost here but it's related to safety/durability so I believe it's worthwhile:

I missed this in the user manual (is it in there??) but from this point on, I will always have engine at 2k rpm when filling or draining G6 ballast. When running heavily weighted, your fill times bump up to almost double, you need the alternator to be 100% assisting with this. (I would occasionally, just run the boat to middle of lake and fill while at only 700 rpm (idle). I don't think you can do it like that, has to be higher ie. 2000 rpm.)