Hi, I have a question on the mixer casting that came with my 1/4 Galloway kit. The drawings show the air inlet passage intersecting the centerline just above the top of the valve guide. On my casting, the boss for the air inlet is down low, near the bottom of the mixer body. If I were to drill the inlet passage in the middle of the boss, the valve guide would cover most of the passage, effectively choking the engine. The completed mixer that I saw for sale on the Mini Steam web sight shows it in this lower position also. I'm not sure how to handle this. If any one has built one of these things and knows what I am trying to explain I would really like to hear from you. Thanks, John.