hope they do well for you then stuart, ill be putting them on it again this year.......ive always darkened at around 5 pm and took covers off at 9 am, i dont think 20 mins either way makes any difference, as long as its round about the same time every day............
myself ive found mine dont want to exercise round home until they come off the dark, but when they did they were doing 2 hours easily............some others dont seem to have the problem of not flying for some reason