Aeropress funnel adapter

This adapter for Aeropress funnel prevents it from wobbling on top of any surface for brewing. E.g. HARIO V60-02, which can't fit the Aeropress w/o funnel but with funnel it's not stable and makes pressing process qite difficult. This design accommodates inserts for funnels' 3 ridges as well as inner rounded chamfers for a better, snuglier fit. 3 additional stiffeners are retrofitted with 2mm holes for filament/toothpicks insert stoppers to increase horizontal stability. Current photo with an old holes, which are a bit smaller. Actual .stl model has 2mm holes.