Hi,
Before you buy this tool go to the link below and take a look at this tool it has a very high helix which is great for cutting AL. and it won't cost you as much. The problem with routers is the way their ground.
http://www.use-enco.com/CGI/INSRIT?P...PARTPG=INLMK32
As you can see this cutter has a great deal of clearence which is what you need to cut ALUMINIUM cleanly. If the part isn't ridged you'll need to stiffen it up. There are several coolents you can use, but I recommend Hangstfers S500 CF, you'll find it at the link below.
http://www.hangsterfers.com/
Good Luck and let me know how it works out for you.
rruybal