@roboteer @watchieboy
I can certainly request confirmation on any official maximum amperage rating for these hub boards, if you’d like an official number but I can attest personally to running 30A through the boards with no issues as of yet.
I would also like to add on to your statements related to limiting the length of the daisy chains to around 4 units. Longer chains than this also introduce the possibility of voltage sags on the units furthest away from the power input, especially during high load conditions. Adding in additional power inputs every 4 or so actuators will help alleviate this possibility.