Tail Heavy Huey Hog

I use Daisy BB's- (you'll shoot your eye out, kid!!)  They are small enough to conform to the shape of any compartment you pour them in, and once there in there, just pour a little CA glue on top of them.  It will spread out and stick to most every BB, and once set, will never move again.  Of course, you can only do this while the build is in progress.

What's also good is dropping a fishing line sinker in the avionics bay under the nose. But probably not going to work for you as its already together but for future reference

Thanks! I will attempt this when I get home from work.

Pop off the lower front bubble windows and glue a few pennies under the floorboards.  This will weigh down the front and make it sit properly on its skids.