I had the old Turkish/Hatsan made Daisy Powerline 1000 version several years ago. Big heavy piston with a stout spring. Auto safety with "trigger" switch which I kind of thought was cool. If memory serves me, you have to remove a big pin holding the trigger group in place to disassemble and reassemble. After removal and a time figuring out how the 'now in pieces' trigger went back together, I used a drift pin from some old drill stock to reassemble the trigger group, and to install back into the rifle during reassembly ,...much like the Diana 34. In interesting trigger design, but rock solid if not over adjusted with the single adjustment screw. I polished off the die cut marks on the sear piece and it worked much more smoothly. Very strong gun when fully tuned and surprisingly accurate for a springer in this price range, smooth firing cycle with a sharp pop action, but be warned,...because of the power it generates, the piston seal will not tolerate being dry fired too many time before the seal fries. I wouldn't mind picking another one up to tinker with. I still have some spare parts laying around somewhere,.....and the drift pin too.
Don't take that trigger apart unless you know what you're doing. I have a Win. 1000 and 800. Also had a Daisy 1000. I took me three two hour sessions over about two weeks to get that trigger back together.