The carb manifold of my Dommie 99 is quite rough inside. I think it’s just the normal casting surface but it does feel rough. Is it worth smoothing the internal walls of the manifold? The bike is just going to be used on the road as a daily ride so I’m assuming there isn’t any point in giving myself more work (smoothing the casting). However, I just thought I’d ask in case the general opinion is that it would be beneficial.