About this 3D model

Having smaller insert than the one used on this : https://www.thingiverse.com/thing:2748835 I had to remix it to shrink hole size to allow smaller brass insert to fit in.M3 insert used : https://www.amazon.fr/gp/product/B07YSRGZ9N/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1