Replying on today's post instead of yesterday about the vacation dosing. I think I'd go down to 0.25 units for the away dose, especially with her seeing some 50's on 0.5 units and not getting monitoring. It's only a few days before you'll be back. You can fill a sample syringe with coloured liquid (tea, juice, pop) and that 0.25 units, to leave for your friend as something she can compare her 0.25 units to.