Hi Spartacles - well it appears to have imported the 'wkt' file which is great, then I hit to 'export' to the Garmin which it did - the question is how to check/start it up on the watch! Am I right in thinking that I simply go to 'Training', then 'workouts'? I named it in the Garming Training Centre, but thats not displaying on the watch itself although I don't suppose it would??
Think I'm almost there, just need a bit of help with the settings on the 405 I think now!

Very excited it may just work soon though after over a year of waiting for Garmin to get themselves into gear!