2008 Infiniti G35x Coolant Leak

After deciding that nobody was going to find the leak except for me, I decided to start simply and remove the plastic coolant reservoir for inspection. It was bothering me that the level in the reservoir stayed constant even when the car was running low on coolant and losing heat. Why wasn't the system drawing coolant from the reservoir? Why didn't the level in the reservoir go up and down depending on whether the engine was hot or cold? Very strange. After removing the reservoir and both hoses (supply/return and overflow), I noticed that the reservoir didn't leak through the supply/return nipple. Turns out it had a gummy clog. I rinsed the reservoir with hot water and cleaned the supply nipple with a Q Tip and got water freely flowing through it. Reinstalled and filled the reservoir to a sharpie line I drew on it. Started the car and sure enough, my coolant level in the reservoir went down as expected. Drove the car to work and the coolant level went back up as the car heated up as expected. So my wild and crazy theory now goes as follows (please feel free to smack it down): As car heated up, the engine tried to return coolant to the reservoir. Since the reservoir was clogged, it wouldn't accept the coolant. Therefore, the radiator cap released pressure AND the excess coolant as steam. Coolant would then condense and appear in the form of an untraceable leak under the car. Because of the clog, when the engine eventually called for MORE coolant, it couldn't pull it from the reservoir leading to the level just dropping and dropping without a resupply. Eventually this would lead to loss of heat and a rising engine temperature requiring me to top off with new coolant. So I'm crossing my fingers that unclogging the reservoir with a Q-Tip could have fixed a coolant leak that three mechanics failed to find. Wild long-shot? Probably. But I'm remaining hopeful.

So any update on if overheating still occurring ..?