Does anyone have any experience installing these on a shingled roof?

My house is a 1915 bungalow with exposed rafter tails. I am installing them myself because I got tired of searching for gutter installers to install them and then trying to be talked out of them.

I have one hung, but it doesn't catch tons of water as the bracket seems to hold it out too far. Should I install a wider drip edge? they make something for this?

This looks very much like the bracket the supplier sold me for my house. I don't know if it matters, that says for facia or not as, like I said, I have exposed rafter tails, which is what I told them.