Hi Gerald
Thank you for this photo. I don’t know if a blueprint for the JG100 diffusor exists. If one exists I’m very interested to get it.
So I did a little bit reverse engineering. I found a lot of interesting things…

The alpha angle is probably 15° or 7.5° that’s quit flat. Flatter than Thomas recommends for “perpendicular blades compressors”
Then there is a bigger “blade free zone” probably 75mm which makes the diffusor less aggressive. It looks that the JG100 diffusor is strongly oriented on Thomas Kamps



My quintessence: Maybe I should build this compressor

Regards Lukacs