Ideally, you need to do a basal test during the day just to see if the basal rates are ok or not.
For the meantime though so that you are not going high all the time, try altering the carb ratio to 1:10g carb just to see if things are better...... the worst that can happen is that you might find yourself going a tiny bit low and you can then eat a small amount of carb as a snack (10g) if the low comes 2hrs after the bolus or if its a bit later, then you can get away with just 2 jellybabies as the bolus will be running out and jellybabies are quick and short acting.
If 1:10g is too much insulin, you can then alter it to 1:12g
Personally, I found that my insulin to carb ratios that I used on MDI were more or less correct. So instead of using 1:20g, I just kept altering the bolus and came back in the end to using the MDI ratios which were 1:8g and just elaborated a bit on those.
Remember that the more insulin you use in your bolus and corrections, then the more that your correction factor will change so add it all up and whatever it comes to, divide the new total into 100 and have a go at using that... Try and keep your daily carb intake more or less the same every day for a while so don't go eating 100g one day and then another eat 150g as the change in carb amount unfortunately also changes the carb ratio like eating 30g carb I can use 1:8g but if I eat 50g carb then the 1:8g isn't correct and I end up going a bit low so for me if I eat more carb than usual, I need to alter the ratio to 1:10 and not 1:8
