Following the article, I purchased a General Precision Screwdriver and also a small chuck from Micro-Mark
That mounts on the end with an Allen set-screw.
Works great at a slow speed drilling plastic. Don't think it would drill well in brass.
The problem is that some posts said the chuck was discontinued, and also I can't access the article.
I only mention it in case you can research the General precision screwdriver and maybe someone else sells the chuck.
Meanwhile I'll be trying to access the article and post if I find it.
Wish I was more helpful!