Garrett has Hart's 6 blade compressor wheel copied and being duplicated by a Chinese company, but are holding together well and run equally well. I know a couple locals running those chargers.
SMH, always hate to hear of Chinese knockoffs on good 'ol american made and developed product..
We build a few sheet metal 20-145 rear ends using advanced center housing. one setup was "bolt in" by customer request and the housing twisted after a dozen hooks. after speaking with advanced they noted it was very important to brace the top of the center section back to the frame (up and forward) to keep them from twisting. the several others we built were all welded in solid and have been flawless all season.