RE: Air Pump recommendations needed
AFTER SALES SERVICE!
I was warned by the reviews of the example of Zulu and measured the metal parts of the frame of my blue pump, these are all 4 mm thick, 5/32 " (4.09 mm with the blue paint!)
It is a German brand and has a German Tüv qualification.
So have attention there is difference in quality!
For us the pump hasn't much work to do, a few pushes to start and after a flight I check the pressure by pushing some more air in the air capacitor, often less than one cycle.
My checkvalve does have a small ball inside so there is no 'threshold' pressure whille pressurizing the capacitor. so the Indicator pressure of the pump is capacitor pressure of the plane.
TF