Injunnut, Dave,

Gotta contradict both of ya. Yes, it's a Jacobs chuck, the drill press is not one of those 50 dollar Chinese jobs,,, it's domestic, bought some 30 years ago and it cost me the price of a radio. No tilt table but I like it that way. Annoying is that it won't cinch down on 1/16" but WILL do up to 1/2", or more.

Now, despite the chuck being a Jacobs, when I cut using the Phillips bit, I get a slight wobble when it's cutting. Huhhh, how? Why? Well, the Phillips bit, instead of the press, IS one of those Chinese deals.

Despite that though, the idea is that the bore for the threaded part is cut at the same time and exactly on line with the taper.

I'm speculating that Japanman, living in, well, JAPAN, has got both a quality press and also bits made in Japan. On the other hand, my SONY Walkman is made in,,, CHINA.

And as the world turns, today is SO different from yesterday. When I bought my first car, a Datsun (Nissan) 36 years ago, I was laughed at by the guys at work. You know,, Japscrap, like that. They stopped laughing some 13 years later when, with 240K miles on it, the engine STILL purred like a kitten, burned NO oil and the cam lobes were not worn at all but just smooth and shiny on the working surfaces.

BTW, Stewart is one right smart guy. When I commented on how poorly the hemi head worked, he explained how squish bands worked and that too MUCH of a good thing is NOT. So, experiment but a hemi head in these small sizes is likely to disappoint. That comes to mind the trumpet head that seemed to work best. As with props, the original Cox folks knew a lot about what works. Notice that the Cox high compression head is trumpet shaped.

Also, classicalgas advises that he makes up turbo heads for vintage glow engines and that this adds some 400 RPM on those and up to 1000 RPM on modern engines. WELL, I guess I'm going to have to make up a turbo head for my hybrid OS .10 and see what happens. Maybe make a trumpet head AND a stock head. Let's see,,, that's number 23 on my list of things to try. Can't believe I'm so bloody busy,,, hell, I had more time when I was working. [:@]