[Amps] Chassis construction question

[JCoupejr@aol.com]

Gary,
 
Keep your eyes open for a set of cutters called Rotabroach. My set  goes up 
to 7/8" if my memory serves me correctly, but I believe you can get  larger 
sizes. I got my set from Snap On, who may still carry them.
 
The Rotabroach is essentially a hole saw that cuts a hole using a  donut-like 
broach operation. It leaves a very clean hole every time. I  learned about 
the Rotabroach from helicopter mechanics who suggested I use them  when drilling 
panels for avionics. I use my 3/4 broach for drilling holes for  NMO mounts 
in cars/trucks.
 
I have had my set now for over 15 years. They do not break or wear  out.
 
Take a look at the manufacturer's website: 
_http://www.hougen.com/cutters/cutters_index.html_ (http://www.hougen.com/cutters/cutters_index.html) 
 
 
Hope this helps...
 
 
John Coupe
Coupe Communications, Inc.
WA3BXH