Digital tyre inflators.

Anyone got a digital tyre inflator they could recommend? As in one you set for a certain PSI and let it do the rest.

I'm lazy and want to play around with pressures to see if I can reduce a bit of understeer, without having to get a smaller rear ARB. Because that wouldnt be fun.

I had a good Mitchelin one from halfords...

http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_215808_langId_-1_categoryId_165703

Which was good, if a little slow to inflate.

I've now got this one...

http://britpart.com/Accessory.asp?PageRef=4&AccessoryRef=2241&AccessoryVehicleRef=

Which is awesome, but it's not a set pressure.