OK that works now. The UI is coming along Sync opens the built-in Calendar, which then closes with an 'Error occurred' (looking at your posts above, I guess you know that) From a usability perspective, it might be better to make the clockface bigger, and shrink the 5 and 1 minute radii down a bit (does anyone need 1cm of radius to plot 5 min increments ?) Pure eye-candy : would love the option to make each successive pie slice a different /random colour.