My first airplane was a telemaster 40. I think all the different scales of this airplane are proportional and hence I think the proper cg locations should be about the same. I no longer own my telemaster or the plans but I'm sure if you start with a cg at the max height of the airfoil section, you will be in the ballpark. If yours is like mine was, the horizontal stab is also flat bottom airfoiled. Of course this is going to provide a bit of lift in level attitudes at the tail. Expect you could work the cg back even further and gain more manueverability. But this plane isn't about aerobatics, its all about stability!
Good luck.