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A very good question. I had to fabricate a cheek riser for my advenger to get a good alignment with the scope. This looks even worse. 

A few years ago just prior to being discontinued, I purchased a new Daina 52 .177 on a whim, and hardly used it. The receiver is date stamped 2017, and I purchased it in late 2018. I haven't shot a full tin of pellets, and it's in as new condition with the exception of some scuffs on the...

Earlier this year I purchased a Centerpoint scope to use for field target, and contacted JD Custom to obtain a nautilus focus wheel. I took it out of the house one time to log the distances on a strip of white tape, then decided to sell the scope. I removed the tape, so it's back to its...

Earlier this year I purchased a Centerpoint 4-16x50 side focus rifle scope directly from Crosman with the intention of using it for hunter field target, but changed my mind. It was mounted and zeroed indoors, but never left my house. It's in great overall condition with the exception of a...

The inlet screen really should be on the side where there is already a hole in the cabinet. 

I suspect some of the oil dribbled into the inlet port will make it all the way to the discharge foster fitting. It's just a matter of how much. As long as you don't inject too much at a time it should be ok. Any excess oil will end up lubricating the gun, which is fine with me. 

On another thread I posted that after every three rifle fills, I turn the compressor upside down and while it's running with the pressure release valve open, I dribble some silicon oil through the slots into the intake filter. Otherwise it's going to run dry and seize up. If it makes it through...

I too purchased the Tuxing rebuild kit about two months ago to have on hand "just in case." I suspect it should fit all the Spritech clones. 

Wow! That's becoming a complex project. Order more than 1 of the bolt o-rings as they are easy to damage. I say that from experience. My current project is breathing new life into a 116 year old Kodak folding camera that fell into my lap. It's almost ready for prime time.

If I remember, the o-ring is not round, and has a rectangular cross section. It doesn't seal anything, but just adds enough drag to keep the handle or bolt from flopping around. Yes it does fit in the groove, and is easy to cut it if you are not careful when disassembling. There is a very...

The 1/16 inch balls cost about 20 cents each at my local Ace hardware. 

I never pushed the power much beyond 12 ftlb, but even then it took considerably more pull to open the bolt. The T-handle never came apart, but it was always in the back of my mind. You can buy the balls which are 1/16 in locally at Ace hardware for almost nothing. When ordering parts, I...

I increased my Challenger to 12 ftlb by enlarging the transfer port, and replacing the hammer spring with one from a Disco. I left the hammer adjustment screw alone. It was then easy to achieve 12 ftlb by just adjusting the knurled hammer spring knob. In the end, I decided to go with an Air...

You can play with the trigger weight screw all you want, but there is another spring buried way deep in the assembly that needs to be replaced or maybe have a turn cut off, making the range of the trigger weight screw effective. Then all of the other adjustments should result in a nice lite...

I really like you idea, and think I have the perfect plan. I just ordered a high pressure stainless 3-way valve with 3/8 british female threads off Aliexpress along with some matching male foster type fittings. The valve is rated to 4560 psi. I will install a foster fill valve at the inlet to...

You can see the gold colored inlet filter through the slots. I use a squeeze bottle with a 2.5 in needle to oil it.

I have the same compressor in black that I purchased from Vevor. So far its been working well to top off my avenger to about 4000psi. After every few runs, I turn it upside-down, and with the vent open and the compressor running, I dribble some silicon oil into the inlet screen which can be...

It appears to be very rugged, and I have no fear of it coming apart. Regarding a burst disk, it does not have one, and considering that the compressor has a burst disk, having one in the filter would seem redundant. I cannot overstate the amount of time and money that small lathe has saved me...

I just added another photo to the post above. 

I guess I will throw some rain on the filter discussion. Having been satisfied with the compressor purchased from Vevor, I bought one of the filters with an internal cartridge with three different materials. Silica gel/molecular sieve/activated charcoal. The first time I used it, it would not...