278T is a fake Pansat 2500 bin that doesn't work and could be harmful..
279 appears to be an old (May 26) Pansat 2700 bin,but I don't remember Pansat 2700 bins already going that high in numbers..so something strange about that bin too...
Listen to LK and don't try hot untried stuff. Cruzat, who is an "old rookie" at that site is also not too happy about using the 278T bin. Wait another day and see if some reliable version, hopefully from BL comes out