Wake window 13 months

I recently transitioned to the one nap. We are on day 4 and its going ok. She wakes around 7:15 and nap around 12:15/12:30. I follow taking cara babies and her suggestion is a 4 hour wake window for 13 month old. Then 14 months it goes 4-6. My wake windows are 5 hours in order to keep the nap to break the day in half to make it to bedtime. So far she’s been fine haven’t seen any meltdowns. Im assuming every baby is diff. Anyone out there with 13 months old that have longer wake windows. Is this okay?