Like many other pistol shooters, I've spent a lot of time thinking about how to integrate fiber optic and tritium sights to get the daylight benefits of a fiber optic front and the low light benefits of tritium. After talking with somone who had tried a lot of different ways of using the tritium tube to illuminate the fiber optic rod, I think the only way of integrating the two sights into what I consider a decent set of sights is the VTAC method of putting a tritium vial underneath a fiber optic rod in the front sight.
However, I'm not a fan of the busy VTAC rear, and I'm thinking that a stacked tube front sight could be paired with a simple single dot tritium rear. In theory, this would give PoA=PoI for the fiber optic and a six o'clock hold using the tritium. It should also eliminate some of the vertical stringing problems created by "straight eight" setups becuase the tritium dots will stack right on top of each other rather than being spaced apart like the normal configuration.
Before I spend the money to have a tritium vial added to a fiber optic sight by ToolTech, I wanted to see if anyone else had tried this sight setup or can think of a reason why it won't work.