I'm working right now on some modifications (I have raised the BCP 20 mm already and built a Fan beneath it {pointing upwards}), also have large heatsinks for VRM's and a wind tunnel with additional Fans on the backside of the box..... but I doubt It will lower the VRM temps below 80 C...
Later today I post some result.
OK, I have a modified-DIY-box below 70 C and running on 500 Mhz:

How do I get above 500 Mhz ?