I bought one of these 60 inch tooth bars, no drilling the bucket & hardened teeth where I've read Piranaha are not hardened. (Saw on YouTube or reviews I think)
It clamps on using four allen socket screws & acorn nuts to keep the dirt out.
I had to replace the acorn nuts as they ship with packing slip wrapped around a tooth. The acorn nuts were all flattened down, Bought four new stainless ones from McMaster Carr.
Used it once already in Missouri clay, works great.
I also used it scraping with the teeth down to pull some brush back & it never got loose. Comes out of Spokane WA., cost me under $425 + the shipping to local
implement shop in town. I think they do FEDEX.
https://northstarattachments.com/attachments/bucket-tooth-bar/