My system is similar, but I think mine is even better,my flashing piece has a built-in 1 1/4" round riser built on it and the lag bolt goes thru the center, and the U shape screws over the top, that can never leak. You actually have to unscrew the U top to get to the lag bolt to remove it. The panels are actually about 6" off the roof, better ventilation. 4.8 kw enphase grid tied w/sunpower premium panels, Installed Oct 2017, this system has consistently produced 5.5 Mw every year, 25 yr warranty top to bottom. If any of my panels drop more than 3% of there rated power in that time they have to replace it for free. I'm very happy so far.
