Insert big

Thank you very much for Beefy bowden coupling PC4-M6 (V2.1) by fixfel (https://www.thingiverse.com/thing:3837897). It solve my Ender 3V2 problem really well.

However, I use "Insert1mm8.5mm.stl" twice and it always broke (maybe my filament sucks). So I remix at the part that usually broke with bigger and wider material.