@ll,
what about this option to get a low heat sata SD-card running (RaspPIstyle )
http://www.ebay.de/itm/SATA-Serial-S-AT ... 1158898956
up to 32GB and nicely "cloneable" when off: not hotswapable ...
Yes, the speed won't compare, but who needs that speed for this device anyway
Any thoughts?