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AEA mods

Has anyone messed with hammer spring adjustment on the AEA HP's? I'm considering this kit for my .25 carbine (switched to bolt action).
I don't know if I'd bother. I did a lightened valve spring and the first that happened is that the shot consistency went right out the window. It increased the power, but the velocity dropped every shot.
My varmint is super consistent shot to shot without changing that. The valve spring and hammer spring seem to be pretty well balanced against each other in this gun. I wouldn't bother changing one of those two unless max power is all you care about.