I had been using a standard 2-flute flush trim bit for some template
routing. Cut quality had been pretty good - but this weekend I had one
experience with terrible tear-out that ruined the piece. A bit like this:
I think I recall seeing The Wood Works Guy (David Marks) use a spiral flush
trim bit (like
http://www.routerbits.com/cgi-routerbits/sr.cgi?1070919921_32526+98 ). But
memory fails me.
Wondering, in general, will I get a higher quality cut (less prone to tear
out) by switching to a spiral flush trim bit? I'm willing to invest the
extra bucks if the payoff comes back in cut quality.