Hi there. I’m considering buying a new panasonic head unit within the next few days. I have however a few concerns: First of all, this may sound stupid but how on earth do you get the current head unit out? I’m not sure of the make but it’s a very poor unit with tape player inbuilt and not many features. Will it be simple to put a new head unit in? As in a matter of putting cables in the right place? And also, If it doesn’t sound at its best, I will replace the speakers in the front of the car. However they’re behind a plastic panel. What inch speakers are these and are they also easy to replace? Thanks for your help.