[hpsdr] Munin chassis considerations?

[John]

I'm looking for suggestions on the best way to mount Munin in an 
enclosure.  I may make my own enclosure.
The fins of the heatsink would not be covered up by the exclosure.  I 
don't plan to use a fan.

For the best heat removal, does it make sense to mount the heatsink 
so the long length of the fins is vertical?
Or should it be mounted so the circuit board is up-side-down 
(heatsink on top, short dimension of fins vertical)?
Or is there another, better, way?

John,  WoGN