The boost curves are a little different, & the high draw servo + Spektrum work arround has taken some time, but I have had great sucess with the MambaMaxPro.
I don't have any extra currently.
Tekin = Smaller, Lower boost start points, Solder posts, 1S friendly, & $$$.
Castle = Weaker BEC, Larger case, 6s compatible, has been used in 1/8 buggies.
I have both Tekin & Castle, love them both.