I'm not seeing anything that would bother me. Sometimes the temptation is there to remove any evidence of the casting but that's not necessarily a good thing. The fact he left some of the casting flaws alone would indicate he has some knowledge of how far is too far. The exhaust port looks well done around the guide. On the intake its nice to have a sharp transition around the guide, but that can only be achieved if the material is there to work with. Doesn't look like its was.