Firstly I assume it IS the TS one? (the wing planform is more swept-back than the standard ZN ones I've seen!)
My TS one was initially set at 190mm aft of the straight LE section, or 265mm forward of the wing's (true) T/E next to the centre cutout. So much further aft than in the TS instructions (165mm aft of L/E). Seems to be similar to other owners' experiences. I have since moved the CG a bit further aft with no detrimental effects. (moving the battery to the servo tray and removing forward ballast).
Hope this helps, I'm sure other fliers will be along shortly............................