Z3 1.9. Would love to do how too. Planning went a bit to pot. Have now added rear Brembo discs. Looking to fit ‘new’ cross member, spare wheel support ( thanks Spurs fan), needs Lanogarding throughout again. New discs and back plates to go on front . New rear brake hoses, which are causing me the gutters asI don’t want to twist or break the lines. My biggest fear. Then it’s the outer sills, clean paint and rust proof. Tons of other stuff: electrics, belts and bit of interior trim.