I used 6 plates on my DFARS only because the bolts were long enough and I assumed the assembled view in the manual was hiding the 6th.
Thank you LWFX for the cross section. Your set up has a hole in the dish above the fan, mine hasn’t. Though my DFARS appears to function OK, obviously would be better as your setup. Looks like my unit suffered from dodgy parts picking.
As an aside I was wondering if anyone else has seen degradation of the plastic on the VP2. On the DFARS installed June 2012 the top 6 plates and top fan plate have remained pristine; shiny, brilliant white and no marks. However the top 2 large dishes on the DFARS though white have gone mat and there are stains deep into in the plastic. The SIM case and UV panel frame are in a similar state. The anemometer transmitter casing is still shiny and no stains, however it’s no longer white but a light cream colour.
Colin
www.hemelhempsteadweather.me.uk