Thank you for the great suggestions, and I apologize for not replying sooner, but I wasn't able to get around to trying a bigger bit until today. It worked perfectly, and now I just need to get some capital raised for materials to be back in business. Thanks again!

First off, I hope this is the right place to post this topic. :?: Second, I purchased a '70s motorcycle helmet for my costume (No, it isn't an ERG) off of Ebay. I cleaned it up and removed the Styrofoam insert (which I still have) with no problems. I then attempted to remove one of the unwanted rive...