You must be psychic!



---

You do not have to "replace" the existing heat sink... and since this may be both problematic and dangerous, I'd advise against it.

Rather what you can do is to open just enough of the covering to expose an area of the existing heat sink, then stick the memory heat sink onto that.

I've done this many times with good results.

The computer memory heat sinks come with a special adhesive on them.

IMHO unless you are into the very high power ranges, a seperate fan is not required... instead you want to assure good airflow through the fuse.... as you don't want the battery or motor to get too hot too.