Hey everyone, new here and got a couple of questions. I was given a Porter Cable 100 and it doesn't have a collet wrench, can I use a regular wrench to change out the bit? If not, where can I get one from? I believe the model # of the OEM wrench is #42157. Also, I read a how to on making a router table in a book and for the opening (where the bit comes through) it said to "put a large straight bit in, start up the router and push through." So, how "large" of a bit will I need to create this opening? I was just going to use a hole saw, but the book stated that the hole shouldn't bee too big. How big is too big, and how small is too small. Thanks in advance for ANY help.