You may need to adjust the trigger. I had a similar experience, and made a small adjustment to the trigger. There is a allen screw on the back of the trigger.
The GX CS4-I are back in stock on the GX site. https://gxpumpofficial.com/products/gx-cs4-i-portable-pcp-air-compressor-350w-powerful-motor-max-5800psi-40mpa-built-in-home-converter-water-and-fans-cooling-5-hours-continous-work-12v-auto-stop
Nuair is now distributing thd Nardi Atlantic P compressors. I really like these. https://nuvair.com/products/compressors/hp/portable/atl10pm116b1rcaa0000.html
The EVO has a claimed 5 hour continuous run time with an auto shut off for excessive heat as well as pressure. The rebuild kit for 50 hrs is $80 dollars. Not sure what to compare that against.
I’ve been looking at several compressor options and saw that the EC-3000 EVO is being offered at a significant discount at several online retailers. This looks to be like a very good option for myself as my nearest option for refills is a 2 hour round trip commute. My primary use will be for a...