That'll Be the Day to Jimmy Calvert in 8 Steps
- That'll Be the Day was based on the song 1941
- 1941 was sung by Harry Nilsson
- Harry Nilsson recorded Duit on Mon Dei
- Duit on Mon Dei includes saxophone played by Trevor Lawrence
- Trevor Lawrence played sax for Good For God
- Good For God features bass played by Klaus Voormann
- Klaus Voormann played bass for You're Sixteen
- You're Sixteen features guitar played by Jimmy Calvert