Hey nitewalker forum, quick question. I'm using the TNVC NPBM with 2 PVS14s, and when I first look through it, things are blurry. This is after I focus them one at a time, going obj, occ, then obj lens. When using with both eyes, it feels "off" for a moment. My brain seems to adjust to this and within 10sec the picture seems great. What I really notice is the feeling of going cross-eyed when I remove the NODs and look unaided. This lasts for a minute or so. I also feel fatigued and a slight headache. Is this a collimation issue? When I flip the tubes around, one combo is definitely worse than the other. Thanks.