I've been changing out reservoir and site every 3 days, but wanted to try putting enough insulin in to last for 6 days and just changing site after 3 days. Not sure how to do it though. You change tubing when you put in a new site, right? It seems like in order to do that, I have to take the reservoir out and then rewind and prime. Is that correct? If so, that kinda defeats one of the reasons for not changing the reservoir - not wasting insulin to prime it. Or is the big reason you do it just to conserve reservoirs and save time? Help me out here, please. ETA: We use Animas Ping, if that matters.