A rifle is like a woman. The longer you work with them, the more comfortable you become with them. You learn their little nuances, and either adjust to them and have a winner, or get rid of them and get a new one. No rifle or woman is perfect, so you have to have reasonable expectations for both. Just the ramblings of lifelong shooter and 43 years of being with the same woman.
Called Remington today, waited on hold for over ten minutes for them to tell me to call Crosman. Called Crosman, waited on hold for maybe a couple minutes, was told they don't have the parts and don't take over the new remington line until 15 april- they only have old remington/crosman parts in stock for guns like the vantage. So I called Remington back, on hold for 14 minutes and change, to get the same line as before. All parts have been shipped to Crosman. I can't wait for Crosman to take point on this, they have always been great about parts. Meanwhile, what to do? It might be similar to the B26, but the trigger group doesn't come out separately and I believe this gun has a longer stroke and/or larger piston as well. Time will tell. Meanwhile I am stuck shooting this box stock rifle. Lol it is killing me, I want to tinker with it so bad...
Ed- by the handle NCed- posted some interesting stuff about his Express about a year back. Apparently the Diana 34 piston seals fit the rifles. That would be 28mm I believe, but the tolerances of the tubes couod vary a bit. I will probably try the Diana piston seal from ARH, and maybe a spring from them as well.