Hello, I would like to install 16 loudspeakers in the front. I need doorboards for this. I don’t want to have any unusual individual pieces but which only fulfil their purpose. Shouldn’t be too time-consuming, otherwise the Borads are more valuable than the car. I’ve already looked at a few instructions, but these are always so super elaborate. I have taken photos of the door and the door panel now. Can someone tell me how to proceed now? Thanks… MfG.