I am running mine on 49 port hub, 10 port siopar 2.1a per port.  when they start all good.  then next day they all stop.  I am using raspberry pi, and uddo machine. it happens on both.. So that might be issues that you are talking about can't go 24 hours without all stopping.  was running them at 250mhz with powered 100v fan.

Not sure what to do to fix this.