Need advice on Brake line parts and configuration

Gahh! This is kind of ridiculous and frustrating.

I received the adjustable valve yesterday. It's a unit from "Right Stuff" braking, I bought it through Inline Tube since I was ordering the P-Brake hardware anyway.

The P-valve came with 2 - 3/16th adapters but as stated in my previous post, the short section of the front rear line came with a 3/16 fitting on one end and a 1/4 on the other. So I bought a 1/8mnpt x 1/4 adapter from advance, but it doesn't fit in the P-valve bore which is also a 1/8 mnpt. I'm not sure why, but I am stepping away from this nonsense for now before do something silly. I'll swing by the local advance and rummage through their fittings again but this time I'll bring the P-vale to dry fit.

In this pic you can see the pieces laid out (The combo block is there for illustration only). you'll notice the fittings on the short section. The port on the block is tapped for the 3/16 end which means the 1/4 end has to join with the P-Valve. In the second pic you see a picture of the adapter I bought which I thought should have worked.

Next to the P-Valve you see the 1/8npt x 3/16 and the 1/8npt x 1/4 side by side.