@neobrainless – Sounds like you’ve pretty much worked it out for yourself. Something I wish I’d worked on years earlier (but was too dim and/or lazy to do) was identify my insulin:carb ratio. Essentially how many grams of carbohydrate match one unit of insulin. Easy enough to do if you have a few fairly standard meals which work most of the time with your regular dose (lunchtime for example). Once the basics are in place, and you’ve identified any changes over the day (I need more insulin in the mornings) it becomes less of a ‘stab in the dark’ process working out your doses, sort of: “This meal is 70g carbs, I’m 1u:10g so 7u should cover it…”