I'm running hundreds of them, for weeks now, with cheapest hubs I could find on amazon, at sauna level ambient temps that make bfl devices cower in perpetual throttle down. Per port cost ~$3 per port, including the power source. 5 minutes or less of soldering per hub.
what are you soldering exactly? Is this has something to do with customizing the hub PSU?
I have seen PC PSUs in several BE rig pictures and the concept of hub mod is intriguing to me.
I have power issues with a 10 ports Anker hub. With 8 BEs it is unstable. Need to experiment with 7 but with 6, it is rock solid.
However this makes my price per port pretty high.
I would be open to go to the electric shop and get necessary parts to do some PSU mods if this can improve my situation.