Good points raideron. Another also would be to realize this plane will fly pretty darn good with the CG at 5". If you are anywheres in the 5"+ range you should fly the plane. You will surprised how good it does. Also, one benefit to a more forward CG is you won't have so much coupling during KE flight.
Other than these things, pull out the lead and go to adding weight.
Thanks,
Barry