Hey! You did great. I love your pony! How long have you been doing this for? I always wanted to do this(I'm 22) when I found out what it was but to be honest I would be scared! You can be my little inspiration!
Now for SugarPlum that was not right of you as the others have said and it does look to be a mechanical hackamore and if so the shanks will be longer. I use to have one. You should be encouraging Big Musky to keep riding as she will only improve with time. She seems to be really enjoying gaming so please leave her be.