Mallard4468, good suggestion. We will definitely do a reach test. I like to tease hubby that he has "freakishly long arms" so hopefully we'll be fine.
I did rework the track plan today to straighten out the top part so the rails were more parallel instead of wobbling around in a strangely random looking way. I was also able to extend the aisle a little closer to the wall at the top of the picture and widen the aisle a few inches.