I'm glad you wrote "FROM GREECE", otherwise I was in danger of passing out.
I like your 'timing vane', a very good idea! It's always a bit vague as you say. I come back in a year's time and all the marks seem to be gone.
Now all you need to do is make from a solid block of aluminum with 1 degree marks, supply it with special bolts in cute packaging and sell it a la Crazy Monkey - the Vain Vulture. Only 53 euro.