Im not smoothing the bay at all mate. Its staying completely factory.
Its a case of grinding back the welds where a couple of holes have been filled, filling those in/ smoothing them off with filler. Then I guess just a case of primer and paint. Thats it - everything else I can do back on my drive again.
Very very simple, no more fabricating needed, maybe a little more grinding/cutting things off, but it should all be done already.