I am installing my first system in my car, and am pretty confidant with everything. I tried to take my old cassette head unit out yesterday but could not get it to budge, I could not find any holes with which to use tools to unlock it, and obviously it isn't going to be pried out. What are the most common ways to take out cassette head units? I'm sorry if this sounds like a stupid question but I feel like I have tried everything
