[tara zish]

Yes that's exactly what I wanted, so I could use it whilst I was sleeping. Hours of pumping just isn't practical for me otherwise. As I said earlier, it would be easy to do and could be done at minimal cost, but unfortunately as I now understand it wouldn't be safe. Since safety is the paramount concern that's brought my project to an end, but I've learnt a lot from this thread so I've still gained from my time here.