Really really weird that you keep getting Friday afternoon ones Dolly when both of mine have worked absolutely fine from Day 1, once I'd got my head round the little idiosyncracies of a different pump of course LOL
I agree there was something very wrong with the original handset I had, cos it killed 3 batteries before they'd have it back. Not a minute's trouble with the replacement though.
Can I ask - when changing the cartridge, you do put it in the pump before attaching the back pump top to it, and you do line up the black thing with the guide mark on the top of the hole where the cartridge goes in - cos apparently so the Rep told me the other week, if you don't do it like that, there can be leakage caused by the needle in the black bit going into the cartridge wonky and - as we know from what happened with the Combo where you have to attach the tubing firmly to the reservoir before inserting it into the pump - that leakage eventually kills the 'piston' motor - I did that with my first Combo pump - so I defo don't do it with the Insight !
In other words for the Insight, insertion of insulin reservoir/cartridge and attachment of tubing are the absolute OPPOSITE of what they were for the Combo.