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In response to my question if they were going to cover the return shipping and what does “we will have a check” mean I received this reply: “we need to check the reason of filling slow. shipping fee will be returned after we received and confirmed.you can pay first. choose the cheapest UPS...

I asked for a warranty replacement and received this reply from GX a little bit ago: I'm getting a very bad feeling about this. I responded: Hi Jason, You should pay for return shipping, correct? What does it mean "we will have a check"? - Rick

Update; I inspected spring in check valve at the request of GX support, it was oriented correctly (of course), I replaced with one from the spare kit, ran new dead head test to 300 bar. Dead head test results: 2 minutes 54 seconds!!! If anyone likes watching 2:54 dead head tests, which is...

After hours of research here at Airgun nation and on Youtube, I decided on the GX CS4. A properly functioning unit should more that fit my needs. I'll be using to fill my FX Crown bottle directly, so no large bottle fills, just easy peasy filling. If I average filling my bottle from 150bar to...

My last dead head test to 300 bar went up to 2 minutes 50 seconds. Prior to flushing with water I removed the check valve and cleaned out the gunk, and ran for an hour, per their instructions. After flushing with water I removed the check valve again, was clean, but running compressor blew out...

Yikes, what a mess. What was you dead head test time new?

I used distilled water, but did not boil. In the email from GX and in the video they didn't say to boil the water, but good observation about the tea pot...

Yes, I ran water through the cylinder exactly per their instructions. Some here have thought that was a bad idea, but if I'm potentialy doing a warranty I need to follow their troubleshooting protocol. Maybe it is the rings? But, how much work should I do on a brand new unit. I'm inclined to...

Update: Did a dead head test last night to 300 bar, took 45 seconds. Just did another one this morning and took 2 minutes 37 seconds! I let it sit for a bit after the test to confirm no leaks and no leaks. This is after meticulously completing the troubleshooting steps from GX support. So...

So, are you saying to not use the auto shutoff feature, to watch the needle and open the bleed valve when you get to your desired pressure?

Yes, I think you might be missing something. My brand new CS4 was intermittingly filling very slow (over 2 minutes dead head test compared to times of 24-28 seconds I’ve seen shared online. GX sent me suggestions of what to try. One of the videos from GX Support showed how to flush the check...

Last week I received a GX CS4 compressor ordered directly from the company. Intended use is to refill the 580cc tank on my FX Crown. My first Dead head test after unboxing took 32 seconds to 300 bar. I topped off my Crown and it took about 5 minutes, very happy. Then the pump started having...

My understanding: 1. For cooling distilled water will outperform antifreeze, so only use antifreeze if your compressor will be in below freezing conditions. 2. You can use an additive, like water wetter or Rislone Hypercool which will provide additional corrosion protection and help to run...

Very interesting! I've had a low first shot issue on my FX Crown that I know isn't the result of regulator creep. The issue has persisted after replacing the valve stem due to a leak. I wish I would have known about this possibility when I had things apart for that fix. It's not a super...

Where did you attach it on the case and did you have to find a sweet spot?

Just received mine yesterday. Yes $495 direct from GX with the 10% coupon code and no sales tax. I have the same MFR date as you: 3/15/2025. I haven't opened up the case yet, but its runs great and loving it so far for filling my Crown. Glad I got an improved version, although not exactly...

Also, you can save another $108 by getting the GX CS4 if you don't mind the AC Power supply being external as that's the only difference between the two units. GX direct out the door pricing (assuming you don't have to pay sales tax) GX CS4-I : $602.99 (after 10% coupon code) GX CS4: $ 494.99...

Order directly from GX. Make sure to use the 10% coupon code on their site and you also won't have to pay sales tax, unless maybe you live in CA. So, the best deal is to order from them direct.

This for FX? For my Crown I used JB Weld. Heated it with hair dryer to reduce viscosity making it easier to apply. Made a big difference in locking in POI. Highly recommend. ( I initially tried to used carbon fiber tube by taping it in place, much muich better to use epoxy)

And, in addition to enlarging your transfer port, you'll want to enlarge (drill out) the valve opening as well...