Yeah, when adding a 12v fan you may have to add 3-4 1N4148 diodes in series with the "+" lead. This will drop the voltage to the fan by about a volt or so. Otherwise, that fan will be so loud as to be noticed by you and anyone you might talk to. You can attach the fan to the heat sink using drywall inserts and epoxy. That'll git er done . . .
Agreed. I like to run it around 11.6 volts. The other deal with using amplified mic's is that the left side of the radio gets pretty warm during long conversations.