I recently had a bunch of 3 inch risers cast for K horns, just to see how they turned out. A couple buddies of mine machined the raw castings down to usable parts. I cut one of them in half to get two half size risers. The two short ones were sent to be anodized with some other parts for another project. The sand cast parts took well to the anodization process (might have to try anodizing an entire horn in the future.)
