Nava is still a belly crawler. We're up to 160m per day and she's getting very fast and she moves her knees a lot more but up on the knees and belly off the floor is still a no-go. But we are making some progress. or I'm taking it as progress. Witness, the first recorded picture of Nava on hands and knees of her own free will (albeit heavily coaxed free will) in existance in this universe.
This is huge. She hates this position with a passion most reserve for politicians.
We continue to use every trick we know to work on it. Now that she's up to a good number of meters a day we are working more on crawling of soft surfaces that are harder to do on belly but more comfortable than the hard floor on knees.