256x256 Boiler Exhaust Low Poly Bake

Well I wasn't intending this boiler exhaust to take so long to bake. I'm wanting to keep this a 256x256 texture and no more than 200tri's I needed to do a lot of tweaking with UV sets, and how I created the high poly model, to work with the low poly. This is only going to be seen from the distance the camera shot isn't going to be zoomed in so at a fair distance this will not look as low detailed although for render purposes I've shown the low poly asset close up to show the depth of texture information from the normal and specular so that the detail I've spent on the texture shows. Its a bit late now to go into depth on how I created the low poly from this high poly, although with each asset I'm creating for this competition I'm running each model through the baking pipeline, to help familiarise myself with the common problems faced.