Hip scooting allows a safe way to get baby onto your back and ensures the apron is fully on baby’s back. Crossing the straps with them bringing support under the knee pits is the way I recommend with mei tais as it allows the optimum positioning and greatest comfort for both wearer and baby. Keeping it tight makes it a very comfortable way to carry. There are 2 ways of tying showed in this video. The second one is great for pregnant wearers as there is nothing on the belly. Here with a 21 month old toddler.
A high back carry with a padded straps meitai, with a very secure way to get baby onto your back (here a 17 months old).
How to wear a baby on your hip