So glad you solved your problem.
I am a novice at machine embroidering and am sick I didn't upgrade my machine 15 years ago as the learning curve is killing me. Anyway, here are some tips that work for me...1. Buy some double stick tape and place it on at least four places on your inner hoop. Once your piece to be hooped is lined up, just touch it to the fabric and you have a temporary hold, then hoop. 2. Turns out the most stable hoop shape is a true circle. Needless to say our ME hoops are not circles. Use some of that fun sprained limb flexible, self sticking bandage (pick your favorite cool color) and wrap your inner hoop in four places. This fills in some of the gap and provides a snugger hold. I would love to hear your trips for improved hooping!