Talking of Solar heating and since hot water is a major percentage of household energy use. This link shows how a simple water heater can be made for far less than the expensive panels...

http://www.treehugger.com/slideshows/solar-technology/how-make-simple-solar-spa-heater-your-roof/

Hi Slightly off topic but can anyone tell me where the Oakley Creek bike/walking path path starts? Is it behind the BP on Great North Rd? does it eventually come out near Pak N Save?