Isle of Arran

After looking at travel and driving we have changed our plans for our Scotland trip and have just booked a cottage in Lochranza in the North of the Isle of Arran. So it is begging time again.we would appreciate any info on birding on the island from local or regular visiting birders. We have been before but many years ago and out knowledge is very dated. There are a number of raptors on Arran including Golden Eagle and Hen Harrier in fact one of my best Golden Eagle sighting was when climbing a ridge and it flew below us all lit up in the sun. As I say our knowledge is outdated so would love to hear from birders with more up to date gen.