I was trying to find out why you aren't supposed to insert a bit all the way
into the router and stumbled across this guide (and found the answer). I
haven't read it all but it looks very good, not much of a sales piece but
lots of valuable info.
http://www.trendmachinery.co.uk/library/Routing_Guides/ccc.pdf
It's a 59 page pdf file. Have fun!
Denny