Re: the grommets popping out. That's where having different speed settings and a foot peddle become a welcome option. Certain racquets are notorious for this, so I slow my machine down, have one thumb against the grommet strip and one sticking the string into the gripper. I press the foot pedal and as soon as the string is secure, I use the other thumb to help holding the grommet in place. It can be a lifesaver, indeed.