The huge variability from peaks to nadirs has me unsure of how to proceed. I've often said that while the guidelines for reductions are pretty cut & dry, the criteria for increases leaves me confused.
It does seem/feel like you should do something! The 53 would give me a little pause on increasing, but it still seems like an increase is in order. You'll have a better idea at some time today, with at least one educated response or more
Ugh. Maybe a tiny increase? I feel confident that I could get a pretty accurate 1.375u now that I am using calipers. Thankfully, I have laser vision and a fairly steady hand 
I would agree, then again I reread Sienne and Gabby's advice - you may not want to raise the dose on a dropping number. So if he is much lower than your last test, you might not want to increase. If that's the case (going lower still), he may already be heading into greens tonight! I noticed several times he goes up from +10 to PMPS . . . if he's going down tonight, then watch out
