Oh yes! 6 units of tresiba and I'm in & out of hypo territory all day. 5 units and I wake up high, but 5.5 is manageable (although 5.25 would be perfect!).
And I'd have major novorapid problems if I couldn't do 1/2 doses - thars why they gave me the pen!
So are you experimenting like me to get 1/4 size doses by pressing softer or harder on the plunger?
E.g. on the classic NovoRapid flexpen, you can variate the dosing by up to 3/4 of a unit depending on how hard you press.
Gentle press to the click and you get around 80% of a unit. But if you before that had already pressed it very hard to the bottom when priming, you get exactly 0.5 unit out of that 1 unit dosing pen.
And going the other way, you can also prime 'normally' and then get like 1.4 unit by pressing the plunger hard when injecting.
Reason being playing around with this is that I travel all the time and find the prefilled disposable pens easier to deal with when not having to handle the cartridges etc next to them. E.g going through the airport scans do not even require you to take them out of your bag or jacket when laying them up on the conveyor belt, etc.
Get one of these babies if you want to join the nerdy fun:
https://www.amazon.com/American-Weigh-GEMINI-20-Portable-MilliGram/dp/B0012TDNAM
0.5 unit of insulin weighs around 0.005 grams, so it needs to be accurate.