I have one on my gate and it works very well.
I had a delrin tophat that was sort of squished and molded into the top of the piston on a TX. It must have been a little too large to begin with. I tried several springs that were a tight fit to grab and pull it out, but none worked. I pulled out an old Ox square section that was tight on the tophat. I used my Dremel to cut a half coil off at the reverse angle of what would be needed if you wanted to actually use the spring. I pushed it down in the piston and twisted it, forcing the chisel end I created to dig in, and out came the offending tophat. Joking aside, I have to admit that this very spring did perform very well in a MarkI TX. It was in the gun when I bought it used, but I swapped it out and found that it wasn't quite as good as I thought.
I have one on my gate and it works very well.
.22 Venom Mach 1 (FAC) 6-25x56 Millett.
.22 Venom Mach 2 Thumbhole 6.5-20x40 Leupold EFR.
.22 Venom Mach 2 Sporter 4-12x40 Leupold.
.177 Venom Vantage 4-16x50.
.177 Venom Daystate 8-32x56 AGS.
.22 Venom Datstate 4-16x56 AGS.
.22 Webley Venom FX2000 6-18x40 Busnel Legend.
.177 Titan MPT by Steve Pope 6-24x40 Tasco.
.177 Pro-Sport 4-16x50.
.22 Webley FX2000 3-9x33 Leupold EFR.
.177 Logan Solo 4-16x50.
.22 HW90 (spring powered) 4-16x50
.22 Gamo Stutzen.
.177 Walther lever action.
I had a few,then the scrap man turned up.
There was an Ox spring in a mk2 TX I bought a couple of years ago. It surprised me, it worked very well.
Found they worked well in my Mercury/635s BUT after a few years you notice the edges of the square section have been chipped.... hmmm wonder where the metal went?
I have a Mercury which has been working smoothly and accurately for years and surprise, surprise, it has a square section Ox spring inside.
Many years ago, I put an Ox in a Mercury. Not a pleasant experience - replaced it the next day...
fitted one in my air arms hi power years ago. felt ok. few weeks later I fitted a gas ram. much better.
I put one in an 80 and it was fine.
It was the full drop in kit they did.
It was really good actually.
I don't think they are as bad as people make out, maybe they were the first service kits out there.
Did any drop in kits precede them I wonder?
Dance like no one is watching.
Sing like no one can hear.
Scratch yourself like you think the zoom meeting has ended.