Lots of good tips in this thread but at the end of the day only you can decide when to take pax.
My first post test flight was with my wife
and to be honest that was more intense than any flying session to date. With a little hind sight I would have waited and got a few hours below my belt.
Rising your right hand for quiet is the best tip Ive read yet in this thread, I still have to use it regularly and sometimes its good just to get some peace and quiet in the a/c
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congrats and welcome to the club