Been meaning to put this up for a while....
Just noticed the time-stamp on the photos, indicating I did this a year ago almost to the day.
There was some talk about the fan grill creating turbulence and increasing the noise factor.
I decided since I was replacing the fans I might as well try and remove any turbulence...
Things I remember
1 - Taking the fan holder out is a major pain. You have to practically take the whole amp apart. Crappy design (mods done to mitigate issues)
2 - The power cable needs to be removed - as in un-soldered from the amp
3 - Don't remove the bottom row of grill squares on the 80mm fans - it adds some strength to the part. Mine is fine but somewhat wobbly.
I used a small hand held grinder to cut away the metal. Go slowly and carefully and you should come away with minimal nics on the frame
Front - Post Lipo
Rear - Post Lipo
The frame attaches at 4 different points to the main boards. Look at the bottom slots on the before picture. These are a nightmare to get in and out.
The middles ones are the worst so they had to go.
I then gave it two coats of metal paint
Here you will notice I cut a grove to all the power cable to remain attached should I ever want to remove the fan again.