8 does not look to be a problem. Although I want the connection side of the batteries to be facing up, which means I need a little more support at the top of the bottom frame (just below the hinge) as the frame isn’t wide enough for 4 batteries.
From a wire length point of view, 8 is just as short as 6 (maybe even an inch or so shorter).
I’m thinking of using angle aluminum to support the batteries both top and bottom, with velcro back and straps (similar to the original four batteries) to hold them. I think the batteries will almost be hanging from the straps in flight because of the angle of the bottom frame and hang angle. We’ll see.
