This frontend was written by Rob Izzard. The stellar evolution code is based on Peter Eggleton's TWIN code, which is based on the STARS code, and has been significantly updated by Evert Glebbeek. Thanks to Evert for his help with testing the code, and his great knowledge of its inner workings, without which this would never have happened. Also thanks to Onno Pols for his work on the code - without him nothing would have happened!