Lol great eye! It’s one I just swapped out for a new one. I run a pair of them in a lead lag config. My tanks are 60 years old as are my pneumatic AHU controllers.
With an old system in an old building lots of leaks means lots of compressor cycles…I get about 5 years out of the pumps.
Malkoff E2S on 16650 body
Did external inspections to both the heating boilers and centrifugal chillers ( hate this time of year) and all associated pumps as is my daily routine.
Lots of rain so isolated a few roof penetration leaks above drop ceilings
Checked air compressors oil levels and...
Yes that’s correct ( or at least the way mine is) My favorite light of all times is the wildcat on a MD3 Running 2 2300 18500. I run with the 1% diffuser from a hound dog as it cleans up the beam ever so slightly with out losing any noticeable throw.