From: null@void.com   
      
   > ...   
   > Lacking those parts, perhaps a water bed fill/drain pump on a variable   
   > speed drill with a latching trigger would do?   
   > https://www.amazon.com/Star-Water-Drill-Pump-024786/dp/B08MFS884W   
   > ...   
      
   You are right - "version a half" for a short recon. of the matter needs   
   to be something very simple using something existing.   
   Yes and can vary trigger pressure on the drill to change the speed and   
   therefore pressure - qualitatively see whatever...   
      
   Thanks   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)