Small mods on my Hatsan AT-44 .25

[Simon Jenko]

Hello folks, since this is my first (or second) post i beg you to bear with me. Today i decided to slowly upload pictures and  descriptions of all mods, done to my first PCP airgun, the Hatsan AT44-10 .25 caliber. Bought this rifle about 2,5 years ago and haven't regretted it for a second.
I read all rsterne's posts about this gun before buying it, ordered the.22  long version with LW barrel but i ended buying .25 factory long barrel and soon realized i dont need a LW barrel, factory one is accurate enough for me. Group (4 shots) on picture was shot at 70m, small flower was used as target, not very scientific but i hope it will do for now. After getting the gun and reading all threads on gta i bought a lathe to make my own mods. I am very sorry for lack of pictures in this post, will try to upload them asap. I made new valve with only one transfer hole, enlarged transfer ports and valve poppet, recrowned the barrel, made a custom LDC that works very well (reservoir ping is(was) louder than shot at 45ftlbs of power), made inline pressure regulator with breathe hole trough cylinder wall, machined aluminium sleeve with two orings to replace regulator to block breathe hole if i want unregulated performance, this sleeve also works as a depinger,  machined a slot in tube under the breech for a M2 screw and brass bushing screwed in hammer for easier power adjustment and also different power adjustment grub screw stop for exact determination of start point. I believe someone will take interest in these mods so please excuse my writing and lack of photos for now, will do my best 

[JumboPellet]

Simon,

I'm currently doing a very similar amount of work on a Gladius, which has an action close to the AT-44. I was curious what your porting sizes were and what power levels you achieved? I'm just about to start on turning out a new single port valve, would love to see those pictures!

Regards