Trj, I just followed the oil filter housing gasket DIY till the end, then when I was there I started the Oil separator DIY. It seems like a lot is going on and can get overwhelming but if you just follow it step by step and you label the harnesses you disconnect it's not too bad. When you reassemble literally follow the DIY in reverse. And yeah the lower intake boot is a bitch to get off because the hose clamps are in a weird spot but it you just have patience you'll get it. Oh and expect to have a sore lower back as well as cuts on your fingers. The biggest thing is patience.
BMW 323I 5 Speed