One of the problems I mentioned last time was the issue of the small diameter drill bits being wobbly. At first I thought I had a bent drill bit. New bits seemed to help but not always. Then I decided the chuck on my friend Chris' drill had to be bad. Answer for that was of course to buy myself a new drill. Still no help. The #40 bits shook the drill in my hand most of the time. A #40 is 0.098 diameter, so it is quite small. I ordered a new $70 German chuck and still had an issue. Finally it came to me that it was the drill stop that caused the problem. Here is what it looks like.
The stop attaches to the drill bit with a set screw. The problem was the spring is quite stiff and can get bent and the hole at the bullet shaped end is the same diameter as the drill bit. It is strong enough to deflect the bit off center. I drilled a number 30 hole in that end and that took the fight out of it yet still works as a drill stop. So after spending about $320 for new drill and chuck all it took was a free hole to fix the problem.
So then I continued on. Not much left of the aft section now.
Should not be a problem finishing it this weekend.
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