So, once I get settled in to my new apartment in a few months, I'm finally going to be buying the parts I need to make my Crystal Focus 7 saber. However, I am super paranoid about chassis parts, mainly that I am going to buy the wrong thing. My question is this; which discs do I need to buy to actually keep everything locked together. I have the PC 18650 combo discs(just a bit of modding to make a CF fit right) and the Speaker Holder 4, but which disc would I get to actually keep everything all nice and not sliding about everywhere?