I am looking at a Davis D100 like this one http://www.purplewave.com/cgi-bin/mnlist.cgi?121025/B2893/1 Does anyone have any opinions on them? I have one that I am looking to pick up. It hasn't been run in a few years but the price is hard to beat. I have already sourced a manual for it. I have a 763 for reference. Thanks for any and all input. Cheers, Barnaby