We bought a new shower from 'TradeMe'. It's a Cimarron NR520R (company has gone bust). It takes about 5 mins of fiddling around with the mixer to get the perfect temperature - infuriating! There's about a 1mm range on the mixer between scalding hot and cold. Also the 'massage jets' are a bit pathetic to call jets. We're not sure if we need a new mixer or a pump. Any ideas gratefully received!