Loved flying the IGS! Never looked at the checkerboard…I had my own ground references for alignment, which differed slightly from L-1011 to -400. I was a practitioner of the 'weasel appwoach' in fair weather - sidestepping to the left when fully visual in order to extend the final segment and/or lessen the bank angle round final, crosswind dependent….
"Cathay 880 request a visual"
"Catay, you are kweared for a weasel appwoach"
Easy, really….