Man I feel you - those dumb engineering decisions that have been around for so long. I had to open a fuel tank to replace a fuel pump once which I'm sure some engineer was like 'well it's all fuel stuff so what's the problem' and that makes sense until the pump goes out and someone has to go in and replace it. I did replace it in my driveway but that was a real BS job and I did also decide then and there I wasn't going to do my own work anymore, which I'm sure the dealerships are/were quite happy about.