Firstly I would like to thank all the info provided by johnnie.black, any reference to speeds are taken from his real world tests post here.   I'm still trying to wrap my head around the different configurations on how to hook up 24+ drives. I've also noticed a lot of question around using expanders. I've made some terrible diagrams in paint to help visually.   I've been hung up on the different ways to connect the controllers to the sas exapnders, and what max speed the resulting drives