Of course I'm 1 year late to the picture show but might I suggest a sequencer for the motors. That is, after the first motor starts, the subsequent motors start at say 1 second or (?) after the previous one. The sequence will eliminate the load surge on the mains of all four otors starting at the same time. Sequencer relays can be found in electric furnaces where several heating elements are used . Also I hope you reconsidered the plastic tubing manifold with something more suitable. Enjoyed your Hyundai compressor videos. Thank you.
Good job, man! I would add the old compressor tank you have, to increase volume of your 50L tank. Then remove the check valve for 100L tank valve. I would forget the Amazon, and buy proper hoses from compressor service.. It was nice to watch, how did you do those updates, man you are good! 😊 (sorry my English.. 😅) God bless to you.
Thanks for your comment, I did think of that, but I need more room in my garage, so I decided to sell the tanks. Yes, I do need better pipes. I will replace them sometime.