Finished the wiring today and ran a test…
…all 8 actuators can be pulling the spring tension load and not pop a 3amp fuse! 
Here’s the testing videos. The first time the one section seemed to be a little bit behind. Seems to have fixed itself in the other videos then. https://photos.app.goo.gl/1WgDbNDzuvPRsjBQ8
This is the connections to the planter tractor. There’s a 7.5 amp fuse in the power supply line, on the keyed power of the auxiliary power plug.