I want to try root in but with an airstone. I have read accounts of even cut roses being rooted like this without any hormone(they hardly ever root in water) I think the air is what makes it so successful. I saw this trick initially from cannabis cultivators ha ha
My plan is to get a small fish tank with two airstones running in the bottom then make a lid that can hold the cuttings upright in the water.
How thick branches do you think? I also want to try with pitangatuba as I only have one plant and that is scary.
I built an aeroponics system (cut end hangs down into the air in a sealed container and warm water is misted onto the cut end for short periods of time at short intervals)... I had a high success rate with vegetative and woody cuttings from several landscape shrubs and perennials that I wanted lots of... Similar to this:

There are a bunch of commercially available "cloning machines" based on aeroponics, but I built mine using a Home Depot HDX storage box, plastic pots and foam cells from a hydroponics store, an aquarium pump and heater, 1/2" pvc pipe for the misting matrix, and misting heads from amazon. The most expensive part was the short interval timer - I could set it to 30 second misting every 5 minutes (or so):

Might be time to resurrect it to see how it does with pitanga and others.