RE: P-26 CG help ! Giant scale planes
The manual shows it as being 105-110 MM behind the wing LE.
Obviously your kit does not have a manual.
If you want a copy, send me your e-mail address via the "e-mail" function of this forum and I will happily scan and e-mail it to you, no charge. It is a 23 page black and white document.
Cheers
Dave