This would actually add MORE carbs to the upfront carb count and the bolus calculator would suggest more insulin upfront (when what is needed is to extend the bolus). I have now figured out a work-around that seems to do the trick. Enter 50% of the carbs in the bolus calculator but schedule them for 30-45 mins later. Enact the suggested bolus straight away. . Using Careportal enter the other 50% of the carbs for ~120 mins into the future. This moves more COB to a later time and “encourages” the algorithms to enact a more aggressive increased TBR (effectively an extended bolus) 3-4 hours down the line.
I am also trying an alternative sensitivity plug-in which allows extended carb impacts rather than restricting them to 4 hours.