Bergstrom's "Spilt Wing Fighter". As I see things the pins that make up the laser cannons are too long as supplied so I pull them out of the model, cut them down a bit and then glue them back in.
I'm using Y-Wing Fighters from Star Wars Starship Battles range - available reasonably cheaply on Ebay.
To my mind the Bergstrom Y-Wing equivalents, wedge bombers (top right) are just too small compared to the X-Wings. And the Y-Wings are the only Star Wars Starship Battles models that aren't hopelessley warped.
Tie Fighters
Tie Bombers
Tie Interceptors
