They do grow out of this 45 min stage!! It sucks, doesn't it? My lo took 45 min naps until he was 5 mo. He started taking short naps at 2 mo, I started using w2s for nap extension when he turned 3 mo, and kept doing it until he was 4.5 mo, and he started taking long naps by himself soon after! By experience, I can tell you that it is a good idea to set a timer for nap extension. At the beginning, I tried to extend naps forever, it was really frustrating and disappointing. So, then I decided to give it a go for 20 min. That really helped b/c if after 20 min of shpat my lo didn't fall back asleep, then nap time was over and my lo had A time. It was much easier to deal with this if I set a 20 min limit for nap extension.
Pat26, that's a great idea!!
Hugs