Don't monkey around with it, just place the car on 4 jack stands and call it a day. On my stock, non lowered g37, I could not squeeze under it to change the diff or tranny fluid. Maybe if you're #120 you'll fit
Also, this way there's no risk of overfilling. You fill it til it starts to overflow, let it over flow, then put the plug back in. Don't over torque. It is aluminum. Snug is all you need.