As a fellow Mantis Q owner, I can say that jerkiness being mentioned is caused by one or the combination of the following;
-wind, wind gusts
-pilot skills
The challenge is for the pilot to hone the skills in order to overcome both!
Being spoiled by the excellent gimbals in the H line, I’m having fun trying to “pilot” the Mantis Q.
Not knocking anyone and definitely not the Mantis Q. I bought it knowing it does not have an H quality gimbal. I acquired it for its ability to fit in my camera bag, plus something to grab when I just want to horse around a bit. Never expected gallery quality imaging, but was pleasantly surprised nonetheless, with the level of quality it does possess.
Good luck and hope you are having fun with your Q, sir J! Hopefully we will see some equally impressive photos and videos to come.
Jeff