Hello,
How about giving siphon feed another chance? Properly reduced, I've shot my 150 down to 8 psi.
I have never had a cup falling.
Mixing and reducing straight into the cup without the need for transfer is a big plus for me.
I haven't got the time to play with it but I would like to make a siphon feed SOTAR (150 body with SOTAR internals)
Alternatively, I've seen somewhere a 3D printed adapter to make the SOTAR cup a hint larger. I am sure it can be adapted to a SG.
The original SOTAR had a beautifully shaped A cup which I assume is larger than the current one.
Thanks,
Ismael