I can't find a reliable CG location

[I-modify-stuf]

Please help with my CG. I finished my tigermoth bi-plane and flew it very tail heavy and crashed. I cracked my wing spar, and bent a moter shaft. I fixed the wing spar and I'm waiting for the motor shaft to be delivered Tuesday. So I have till then to find the correct CG. I've looked all over the Internet for suggestions. But it seems like nobody has made a cg vid for tigermoth bi-planes and the manufacturer suggestion is wrong so please help soon. My parts come in Tuesday and I want to have some fun. I also have super bright led lights coming

[I-modify-stuf]

[xviper]

Is this the Nexa Tiger Moth - 1400mm? Is so, did you use the CG as indicated in the manual (page 20) and did you balance it by holding it the way the manual suggested? Were you able to at least get it up high enough so you could trim it? If you did this correctly, then something else is going on.

[kallend]

1. Where and how did you balance it?

2. What exactly do you mean by "tail heavy". Describe the flight characteristics that led you to that conclusion.