I used to drop mine to access but it seems now that if I do that, the tank is empty in the morning. If I leave it in standard, the same but if I leave it in highway, more often than not, when I start up the day after, it levels up in a few seconds and then the pump stops within a minute or two.
I don't think that's right but that's what happens.
I need to investigate because it still dances around a bit at standard height for some reason. I've got a pile of datalogs from nanocom but not had time to look at them to see if I can work out what's going on.