savox
this is not being biast or anything.
best thing to do with a losi radio tray is to put in a Savox SC-1258TG servo.
digital 12kg, AND its not as tall as the other standerd size servos, your left with about 3mm from the chassis and guard.
i tryed that and so far good luck after like 8 months... have recently put in a KHDZ radio tray stiffner to remove the radio tray flex.(hasnt effect performance at all)
and my alpha cant have its carb ball turned around so my throttle rod linkage is on a 45DEG angle mybe more. no problems at all.