Hey Jesse
Good call on the 1.75 on that low of a preshot, I know you aren't comfy shooting real low because of the fact that you have to leave him for so long during the day, so always error on the side of caution, now I happily shoot a full dose into Autumn all the time when she is in the 50s and 60s but that is because I am home to watch over her and for the most part she doesn't throw me too many surprises along the way since I know her onset with the Levemir won't be until nearly +6 anyhow so she will have plenty of time to rise and more than likely unless I'm running really late like this whole last week she will have been fed twice before her insulin even kicks in.
That is one thing to remember when working with Lev is not only is the nadir later, but so is the onset. Haven't really had a chance sit down and look at his spreadsheet to see where his onset is at this point now that you have switched insulins.
Mel, Maxwell, Autumn & The Fur Gang