I am thinking about getting a pencil/small type heatgun, and strapping it to the side of my hakko. 

This way, any time I run into issues with multilayer boards, I can preheat. 

I do that now, but it takes both of my hands = not elegant. 

I never get the tip hot enough to power through multilayer boards by itself. For one thats a bad idea as its hard on parts, and two thats an extremely localized spot for a heat source and can break hairline traces in the inner layers of the board due to thermal shock, if they connect to that point. 

been there, done that.