Thanks Ozzy for the easy and effective tip on heat sinks from Amazon.
I bought a four pack of 40mm x 40mm x 11mm Aluminum Heatsink Kit with 'Pre-applied Thermal Conducting Adhesive Tape'! All for about $10. My EtherRegen definitely runs quite warm, agree not hot. I was more concerned about cables lying on top of it over time. I placed three of the heatsinks on top (four would fit). It has noticeably cooled the unit, and now if a cable rests on top it rests on the heatsink fins which are cooler. The EtherRegen made an improvement in my system. I have now added the Muon Filter, so need to try removing the EtherRegen and see if I miss it! Network Acoustics recommends leaving the EtherRegen in front of the Muon filter.

