The fact they could pull one apart, and have it back together in a short period of time…
Probably means they’ve done a few.
I thought it best to leave it to them.
I’m sure they’d sell/post you a kit.
Whether the experience from there onwards, is learning or frustrating, depends on your mindset and mood.!!
I’ve only ever had one blaster worked on by a tech and that was my first one, worked on every other blaster myself being mostly successful in the end, sometimes took a few goes but got there, all learning experiences.
I’ve seen a number of breakdown videos for it and the biggest hurdles were some springs that aren’t captive that fall out when taking the outer shell off. If it’s just an o-ring/seal needing replacing I should be able to figure it out, otherwise if something has broken I’m up the creek…
Just had a look and the o-ring kit I saw was for the GBBR’s.
Give em a call.
I’m sure they’ll have a kit they can send you.
For me…I’m keen to learn…But get frustrated and annoyed, when I “run out of knowledge” , and don’t know how to proceed…
I get that it’s all about trial and error…and learning… but it’s easier when you have help/ knowledge at hand…
Get progress, and minimise frustration…,
Same… first blaster I bought got screwed up by an M4A1 “tech” (and I use that term very loosely 
)… after that it was dive in, no guts no glory DIY.
I’ve learned a lot, never looked back and only a few have ever beaten me, and that’s only because the OEM design and parts just flipped their middle finger up at me and said “No way, Jose!” If the shell was just not conducive to a box transplant I learned to live with it as is and just appreciate the form factor.
Le Hui X-95 Tavor being a good example of that. 
Huzzah!! I was able to fix my shotties leak. Lucky for me it was just the o-ring between the buffer tube and receiver where they connect thru.
Apart from the o-ring being rather thin, I think it slipped down between the intake and receiver and just wasn’t sealing properly, so I replaced it with a much thicker o-ring that fills the gap more so shouldn’t be able to escape.
All I had to do was taken the buffer tube off and the stock/grip piece and it was under there.
Holds gas and no hisses so I’m happy, sooo glad the leak wasn’t deeper 
Must be golden eagle things!! Mine had a slow leak, which was fixed the first few times by just tightening the gip screw, since I have the pistol grip with no stock version gas goes in the pistol grip on mine. Why would you make the main part you hold that also holds gas secure?!?!?
After a few re-tightening of the screw to fix the leak, I have to replace the o-ring.
Currently it will hold gas for a few weeks, but has such a slow leak that it will be empty over time.
There’s a single bolt holding the grip and stock adaptor thing on and that’s the piece that interfaces with that o-ring, you need one of those domed Allen keys to get it too cause it’s on an angle, them the buffer tube reservoir threads into that like how it does on real AR15s and that’s got an o-ring on the thread and gets sandwiches between the body and threaded ring…
I know the design is like 10yo at this stage but surely there was a better way to do it.
