you're describing the "Burst" trim... that is the one i have, and it did come with the motor mounts

i've got an OS 160 on mine. i left the servos in stock locations,, and even with a heavy battery up front, i had to add 4 oz in the nose.
if you use lighter servos, (not metal gears), i think it could balance with out adding lead.
the moki is a bit heavier than the OS , so it should be close!