HI Sam
I wished I had something better I could tell you, most of these planes weigh 40 to 45 ounces, 55 ounces I am afraid , maybe more weight than the plane can handle and still fly well, what will it weigh when you add the 6 ounces of nose weight?
I can tell you that it is very tail heavy and that almost always comes from way too much finish. Can you refinish and lighten up the rear of the plane?
If not I would suggest flying it tail heavy with a handle that has about a 3
to 3 1\2 inch span.
Let me know when it gets in the air, the plane will fly, I just am not sure how well
Regards
Randy