Putting in new terminals for my souped-up Minimus 7's. The stock terminal plastic board is approx 1.5" x 3". What kind of material shall I look for at the hardware store or Home Depot? Something I can drill and cut with a good scissors or tin snips. I will also find some gasket material or goop. I have 5 or 6 sets around the house. Upgrading all of them. I cannot even believe I didn't do this sooner, like when I upgraded the crossovers, etc. I am thinking it will be a massive improvement. Got these: https://www.parts-express.com/parts-express-spring-loaded-binding-post-speaker-terminal-pair--091-1152