Simplify ••• WiFi ••• LocoFi™
We have performed laboratory tests using enclosures of aluminum foil and we did not notice any marked reduction in WiFi signal as long as there was at least a small opening somewhere. Metal enclosures in general would tend to just reduce the range of the WiFi signal. Worst case, we may need to extend the antenna outside of the enclosure.
Please do note that LocoFi™ isn't yet available in "steam" sound scheme.