Well you wouldn't know in advance when it's going to release would you? so how would you know what to tell the pump to do? Maximum delivery of a delayed or extended bolus is 4 hours on mine. Not much help really with eg pasta or jacket spud* which doesn't hit until about 6 hours later, is it? LOL
* because there's always shedloads of fat with them - cheese and ch and butter, I wouldn't eat either without.
OK Sue, for pasta and jacket spuds, I have sat and tested my blood every half hour until the cows come home because they are summat I want to eat quite a lot. I couldn't be bothered to do that for summat that's sposed to just be a quick occasional treat - it stops it being a treat.