Aluminum Heavy Duty Lazy Susan Rotating Turntable Bearing Swivel Plate Hardware for Dining-Table (4 inch)

A bearing like the one in the link below would be better. It's not hight precision but I don't think it would be much worse than your design. It would also simplify the design and assembly https://www.amazon.com/dp/B0BTBSXFS3?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1