Saga SS-10 Traditional 5-String Open-Back Banjo

I'm an experienced bluegrass banjo player and I bought my Saga banjo 6 weeks ago, to learn the clawhammer style. It arrived in a flimsy cardboard box, which appeared to have been kicked at the base. Upon opening the box, I found there was not enough styrofoam to protect the banjo head. The tailpiece was bent and an adjacent bracket hook was loose. I was able to bend/tighten them back into place and make the instrument playable. After adjusting the bridge placement, I found the neck was true and the string height correct. The tuners are inexpensive but serviceable. In standard G tuning there was some faint buzzing on the first and second strings. In open C tuning it sounded better. Unfortunately, after maybe 10 total hours of play, the plastic nut at the 5th fret broke and the banjo is unplayable. The nut where the headstock meets the neck is also made of plastic. I hope to replace the cheap plastic nuts with bone nuts, to solve the buzzing problem and improve the overall tone. With those improvements it should be a pretty decent banjo for the money.