Yes. First test and there is a bug for sure. Deleting the operators works fine, but for instance with this simple task:
ENC/VAL -> ADD/A
ADD/SUM -> SCREEN/FILL
With ENC/MAX=10 and ADD/B=5, I can modify the screen shade from 5 to 15.
Now if I remove the operator ADD, in between PRESET and SCREEN, everything seems to work fine until I press the Mode Switch to go into performance mode. Then and only then my Aleph freezes and I have to remove the power plug. I tried some other configurations, same issue each time so far.