Motor Elevation / Height

I’m building a large octocopter, but need some input on the location of the motors.

The chasis is built with 4x tubes that are basically in a # pattern.

But, because of the virtue of the design, 4 motors will be at 1 height, and the other 4 will be slightly lower.

Will this cause an issue?

Or do I need to make the motor mounts compensate for the 4 lower motors, and bring all 8 motors to the same height / elevation ?