Rev 1 rods (like in the Zen) are 36".
You could hodge-podge 1.5 rods together, but with that much wingspan, the torque on ferruled joints becomes more of a factor, as does their effect on the smooth curve/load in the leading edge (which is critical)... Possible in a pinch, but definitely not ideal.
Also, while it's on my mind... I want to passionately thank everyone who put time on the Zen during testing, your input and encouragement have been invaluable... And especially to my left-hand man (on iQuad), Steve de Rooy, who put in a significant amount of time on the prototypes, very much helping shape this final beauty.
Love you all!