Amvona Speedring for Photogenic
A speedring solution for the Amvona universal speedrings that works for me is the Norman Speed Ring Adapter for Photogenic (Part #812615). For $18.50 I loosen the four retaining screws on the Amvona speedring, remove their insert and drop in the Norman Speed Ring adapter and retighten the screws in under five minutes.
The Norman ring adapter comes in over 18 different studio light versions - including Profoto, Dyna-lite, Photogenic, etc. This option saves me about $31 over the cost of a new speedring.
Peace of mind is often seen best through a viewfinder