Join Date: Dec 2012
Location: Escondido California
A resawn stick has serious EMC (moisture issues) compensation problems no matter. So to accommodate that, I'd rip the planks in 1/2, (~<6") joint one face, then slot one edge. Insert skinny spline, & glue back together & replane.
With very little waste on the edge joint; the sticks will join with nearly >95% of a match. You won't be able to see the loss.
Slow? Maybe, but necessary too as your 12" sticks will cup so badly without the reglue/resaw that your yield will suffer. Moreover, with a good glue press you could be faster than you think.