it would repeat the keystroke, but you can set the interval. Even a traditional keyboard is "repeating" a help keystroke, just at a rate of 1 stroke per 100 milliseconds or less. So, just set the repeat rate between 50ms - 100ms and I imagine it should work the same as a normal press-and-hold on keyboard.
I am not really sure, but I'm going to start testing in a couple of weeks when I get more time to tinker with it.