I want to say thank you for all the data you are providing trough this post.

I'm in the same exact situation as you are for saddle width. The difference with my fit is that I have a really long inseam (94 inch) so I need to raise my saddle so high that it brings it to far back even if i'm using a zero setback seatpost.

I was hesitating between the italia max slr and power saddle but local bike shop around me have ****ty service and poor saddle program.

I want to thank you again for you contribution!

Current saddle is romin evo 143 and specialized henge 155 on a CAAD 12 60cm (should have got an 63 cm)