Minimal 3in1 portafilter / tamper / Umikot ring stand

Minimum ring base required to support a naked portafilter with handle perfectly touching on the table. Inner hole doubles as a tamper holder.

Every portafilter is slightly diffferent in bottom diameter and handle angle, so its impossible to create a base that can serve multiple designs. Here are some variations that I endded up doing. 

• One for a chinese naked PF (YUAN-ECT with colorfull handle) 
• A slightly taller one for another chinese PF (bingo)
• A 3in1 Umikot variation, which acts as base for
  • Umikot WDT 58mm ShortTab
  • any 58mm tamper
  • Lelit original naked portafilter