I've produced version 2.1 of the WeatherPi and now have 4 in long term test. They seem to be doing well. It looks like the MCP23017 chip can't keep up with the wind speed detector, so that's sensor is now going through an arduino nano, and in to the pi via the serial connection. If an Arduino Nano is being used, might as well use it for the analogue sensors as well.
Possible changes to the Weather Pi? Remove 2 x I2C Analogue converters and replace with an Arduino Nano. Add 2 headers dedicated to running servos direct from the pi for Pan and Tilt Camera. Add header for serial I/O. Possibly pre-route some GPIO ports to the breakout section of the board.
On a separate subject I've moved the 433mz receiver from a dedicated Pi to the Weather Display Pi. This seems to be working well.
I've removed the aircraft tracking facility from Pi 7 as I never seemed to actually use the data. I did have it feeding in to the Flight24 website but again they never seemed to use the data.
My test Pi is currently testing PL9823 RGB Addressable LED's which are similar to Neopoxles / WS2811 / WS2812. Testing seems to be going well, although I can only get them displaying Red, Green, Blue, Yellow, Purple, Pink and White. I can't get them to "dither" other colours.
I received a Pi Zero on the front cover of my Magpi Magazine, and at this stage not sure what I'll do with it.