Thanks WN&H.
SkyScrapin & elwarpo nailed it on the head.
When I got everything for this set up (Breach, KVC & IC/Mod Armory stuff) and after using it for about a week I was pretty disappointed with it. I was debating between the COTI (at current prices) or the Breach and felt like I made the wrong decision. I'd spoken to a few guys who said I should be able to make it work so I kept at it. I figured maybe I just need to use it more but I still couldn't make it work. No matter what I tried with the D-14 and dovetail adapter I couldn't get it to work. I was going to order the IC/MA dedicated Breach arm but QD is important to me so I didn't and I focused on the KVC.
I started by playing with different mounting positions. The -14 is a -14 and more forgiving so I didn't mess with it and focused on the Breach. I tried each MUM rail, both K clips, and different IPD spacing. When I got to the rail, K clip, and IPD setting mentioned in the video it was immediately apparent it was better and overlaid very good. Of course that's with my eye spacing/facial geometry. Ambient lighting, the brightness of each device, using portrait layout, and how fresh or tired your eyes are play a big role in how it works or at least for me they do. For instance, last night with zero clouds and a bright ass Moon the thermal was hard to pickup until outdoor alert made a good hit.
It isn't actual "fusion" but rather a good overlay, however, certain objects do appear "fused" in outdoor alert and other times the thermal & NV images are slightly offset. With the new configuration I found the offset is close whereas before it was way too offset and produced a bad double image that made my eyes & brain hurt. It forces your brain to work harder than usual. When scanning across different scenes my brain will start switching between NV & thermal until it settles on which one it wants. By good overlay, what I mean is that when I get a good outdoor alert hit, my focus shifts to the thermal and I see the portrait layout thermal image superimposed on the NV image. This is why at least for me it has to be in portrait layout so it can superimpose and you can still see the NV image.
I used the poor wifey to help me find the right configuration. I'm blessed to have such an awesome woman who actually likes this stuff and is willing to stay up late at night in the cold. If you don't have one of those and have livestock around that should work too (LOL). It works awesome when I get a good outdoor alert hit because the bright colors make it pop against black hot which can ghost out and my brain immediately switches to the thermal image.
ETA: I have my -14 on my dominant eye. I swapped from GP to WP tonight and the WP does work better with the black hot in outdoor alert mode.