DK had the best trigger kit, he's no longer in business.
Timney is okay, never tried johnny Glock, and vaneck was okay, however vaneck does not stand behind his product from my experience. Buy at your own risk.
Another option to look at is Zev
Looking for an alternative safety. the sp01 shadows safeties drop lower than the std sp01, while shooting my big paws something's moves the safety up to a point where the trigger pull gets heavy, ie semi engaged. will the safety from a sp01 work on a sp01 shadow? Know a place that has them in stock? Open to other safeties that I can possibly change that will move up higher or make it extremely difficult to to engage. Thank you in advance