Aimless, welcome to the Yard, good to see you over here.

As to me, DI has always been fine. Only problems I ever experienced with DI is when a bolt carrier stake job was not correct and gas was bleeding through.

As to a piston, I would like one, but don't see the need (for myself) for the price differences.

Men you can't trust, women you can't trust, beasts you can't trust, but Bussekin steel you can trust