Hello there Texter.
I'd love to find out more about your Tetragonula Biroi Friese. I have one hive of stingless bees, Tetragonula hockingsi, and it would be interesting to find out differences. For instance, shape of brood nest and honey pots, temperature they fly at, favourite foraging plants, appearance, foraging distance, what type of hives you have in the Philippines...
I don't have time today to talk about our hockingsi, but I'll get back to you soon.
A cerana is not a welcome visitor here, but mainly for the potential to carry varroa which it is pretty immune to. The incursion we have had did not carry varroa, but they are now well established in the north.