MAMEWorld Forums - Hardware - Lightgun hacks, mounted guns ideas, and RF to VGA suggestions?

Good Evening Fellas love the site.

Ok here's my situation I've got 2 tube sets, 2 P4's ,2 NES zapper's (that are curently being used as fridge/freezer door handles lol)and two Wii remotes.

I'm building two cabs one with T2\Revolution X I want it to have mounted gun

The other running Carnevil\Area51\Maximum Force with a lightgun.

The mounted gun don't seem that hard It basically a machinegun shaped joystick with 2 buttons the concern a have is I need it to "swivel" not "tilt" the trigger and disc/grenade buttons I can just wire to a usb gamepad board.

Any suggestions on the swivel joystick?

Now on the other can I have two options (maybe lol)
I can install blue tooth and shove Wiimote guts into an airsoft pistol or I could try and hack my NES Zappers to work with MAME both options sound like major pains in the arse the latter more so than the first option.

either way my tv's are both RF only input so I gotta either get an RF modulator with a vga port, or go RF>S-Video>VGA. Which option would have better picture quality?

Any help on this would be much appreciated I look forward to hearing your ideas thanks.