It could be done, but you would have to keep the existing wood spar and Dihedral brace. Due to the design of the wing halves' fitting, it would result in a floppy wing.
The halves would stay attached as both halves are double bolted to the fuselage, but as i said, the wing would flex, and from that the spar socket would wear, = not good!!
I do, however much agree, that a 2 piece wing would have been a worthy addition/option to the kit.
If you want soemthign large then try a Glen's CAP 232.
Their 30% does all the 3d, is a superb IMAC model, and has loaaaads of power on the Zenoah 62 it's designed for. The rudder and hor. stab is easily removable, and the wing is in two parts.
see
www.glensmodels.com