Yes, flight time was 2 min less than stock Solo when I first tested the setup with the original Solo batt fully loaded with gimbal and GP. With the 2nd batt in parallel, flight time is now 18 - 20 min depending on when I land. I can get 2 - 3 more minutes if I ditch the 4X retract servos but I like them and 20min is plenty for me.I totally wasn't criticizing the design, someone had said earlier that it got less flight time than presumably stock.
Can you share the total flying weight with camera and how long a flight times you're getting?