Motor mount construction

[RC-Monster Mike]

Welcome to the forums, cartwheels!
If I am understanding you correctly, the motor is leaning a little vs. being perfectly parallel with the spur? Perhaps this is partly due to the weight of the motor? What motor is it? When you land a jump, this distance may become greater due to flex in the motor mount. It is hard to say without actually seeing it, but if the angle plate is thick enough, the flex should be minimal(if the plate isn't think enough, the issue will worsen under high stress as I just mentioned). You could also place a washer under the low side of the new motor mount, to bring it back to level.