Binary trigger, Franklin or Fostech?

Hello all,

I’m looking at binary triggers, the options are: Franklin Armory BFSIII, Fostech echo AR-II, and lastly fostech echo sport.

Currently leaning to the recent Franklin armory, due to reviews I’ve read. Any one have anything to sway the discussion? Echo sport is comparable price wise but the selector in trigger guard sketches me out. Reviews in craftsmanship have me worried about fostech.