I looked into the digital calipers but again New Zealand is not easy to get things at moment but I will try. The 2.25 doses were more like 2.3/4 when I examined the syringe with a magnifying photo and ruler. What is certain though is that I have done the same dose for 10 cycles now. I have kept the photos of syringes.With a human meter 50-100 is normal. He hasn’t gone too low. So he’s been on the same dose for 8 cycles or were the 2.25 less? You might be able to get digital calipers faster. That is even more accurate.
https://www.felinediabetes.com/FDMB/threads/dosing-with-calipers-updated-w-videos.79851/#post-862835