Passive A/B + Y

[Dostradamas]

I guess I will start here
Found a diagram and bought some parts

Of course I laid it out wrong and the in is on the left

 

[Robert]

Of course I laid it out wrong and the in is on the left

That's a left-handed loop switcher and those are even more rare than the Klon itself.

 

[Dostradamas]

Bendered it up a bit