Just a very quick note to say Thanks to Google for makeing Sketchup free. (how could they not). I have even managed (a very Crude) model of a trig pillar; Toot Hill in Wiltshire, also demonstrating the easy intergration with Google Earth. Anyway see my models here in 3D warehouse. (if you do want to see in Google Earth, then I recommend this kmz, as the one from 3D warehouse doesn’t have the view set very well).