I was checking out my trigger as well. While not a trained engineer, I wonder if a different type of spring could be adapted to function?
I haven't disassembled my trigger to get a look at the top connection point. I hope it has one function.
I wonder if a notch in the back face of the bar of the trigger, and a groove around the hub the safety lever engages could hold a spring through recoil.
Has anyone disassembled their trigger down to parade rest? Did ya take pictures you'd care to share?
On another angle to try to rectify this issue, I think a TriggerTech Special, without bolt release, would physically fit into the slot milled into the action. I've ordered one, and will test out my theory when it arrives. I plan to fit stainless shim stock to either side, to get the trigger centered.
Has anyone tried something similar? What were your results