Ok so far so good, got all the gear in the new tower and array started without issue! 2 new drives popped up in unassigned devices and i am pre clearing one of the new drives now. looks like it will take nearly the whole weekend! I wussed out and just used the old pre clear plugin as i did not want to mess with any terminals etc.
So first step, after the pre clear finishes, i stop the array and add the disk as Parity 2, then start the array and let it build it? Once that is done i guess i pre clear the next 10tb and get that ready.