QUOTE(Deirdre @ Mar 19 2008, 12:41 PM) [snapback]550672[/snapback]
QUOTE(OldGriz @ Mar 19 2008, 05:04 AM) [snapback]550414[/snapback]
Once you learn to cut to the bushings properly and develop a finish you like (my preference is nitrocellulose lacquer... generally 5-7 coats allowed to dry for a week then polished) you can start making high end kits...
I have a
lot of practice making bushings, fortunately (or unfortunately). When I was a kid, my stepfather's business made (military) aircraft parts, and there were custom bushings that needed to be made. Since there were only three of us in the company (my stepfather, my mother, and I), we all got a lot of practice at making bushings. I can still smell that nasty cutting oil with the sulfur in it.
I also got very good at making things to very exacting dimensions, as everything had to be within a fraction of a thousanth of an inch, and they were made by hand.
Doesn't it make you all comfy knowing that some of those planes had critical parts made by an 11-year old?
To be honest... I would take a workforce of 11 year olds that could work within a few thous. than the workforce of people we have now that might not even know how to measure something.

BTW, IF you still have the tooling to make bushings, I and many others have gone to making pens without the mandrels and junky bushings made in China. I make all my own bushings with a 60-degree center hole, and exact tollerances. Dead center in the headstock and a live center in the tailstock and you can begin to have really true pens. There is just too much "slop and slack" in the mandrel and bushings for me. I can take one of my bushings (they do not have thru holes) and just on friction fit alone, displace the bushing on the other end of the tube when the second bushing is put into place. Just air displacement will move the first one in and out like an air piston. This method also helps pull the blank off the lathe faster to measure with calipers than trying to work ont he mandrel and with the bushings in place. If you get a chance, give it a try...