Yes, you are 110% right on that and luckily Shettles has been totally debunked anyway! Full story here
http://genderdreaming.com/forum/gend...le-timing.html
Most of us on this site have 2-3-4 or more Shettles opposites. WE are getting best results for pink by having one attempt the day before ovulation or at positive OPK (and NOT because the day you DTD sways, it is just a good point in time for conception with that one attempt.) For reasons we can only guess at, number of attempts sways, timing does not. :)
Hi and welcome by the way!