The 372 box is a vast improvement over the 370 being much faster in opperation with its increased memory.
I did the heatsink mod and added an internal fan and the box proved very reliable.
The fan was hard wired to the 5v hard drive power supply which meant it was live even on standby but I only turned my box on when I wanted to watch tv so this was not a problem.
You will find that unlike the 370 heatsink being held with plastic retainers the 372 heatsink has a metal cage that is soldered to the circuit board but this proved to be easy to remove and re-install.
I have been using a Humax T1000 box for over a year now and it has proved to be 100% reliable with no problems at all.
The mod is well worth doing on the 372 and it makes the box ALMOST decent.
You can see some of my pictures with the fan fitted at the bottom of this page
Must not forget to thank Mike for coming up with this mod in the first place.
John