Hello folks (again), I've another question related to my sandcast restoration. It was (gratefully) pointed out to me that my bike, as I found it, had the wrong (finned) oil filter cover/case . Fortunately , Yamiya offers the a correct repro . That just arrived and I note that the casting is really rough. I thought that it would be nice and smooth and shiney but this is far from that. Is it supposed to be a pretty rough casting? I find it hard to imagine that Yamiya would sell it that way if it was supposed to be smooth as the parts that I've bought from them have been very good to date. Bob Andren