Try the search button there are several threads on IRoast - I dont use it. *If you search each bean type you will find several profiles for roasting or at least to what colour they have been roasted to and the resulting flavours. *Most here use the Coffeesnobs Membership card colours when referencing such as CS 10. *The Membership card is available through the bean bay sales section. *Others use the other grading systems eg City roast
The search button is your friend for research. *;)
PS I have found the Gambella to be a great coffee to roast. CS 9-10.