A couple of comments:
When the thermal conditions are excellent you can enjoy a view as good as the photos you see on line, but unless conditions are excellent there will be degradation. Warm blooded creatures still pop out, though range may be effected when conditions suck - this is the same for any thermal. Make sure you focus using both objective and ocular focus features. My advice is to focus to infinity and leave it there. POI with the Patrol will shift if after zero the objective focus ring is moved.
To make NUC'ing quick, easy and one handed, get t Butler Creek lens cap. Can't recall the size... There are witness dots on the Patrol behind the focus ring, once the Patrol is focused, then sighted in and cap is installed make a witness mark. Reconfirmed zero and focus.
Because the Patrol does not feature true columation like a built for purpose clip on, "columation" is achieved through other means, I think the Patrol relies on aligning reticle so, but I'm not sure. It makes a dandy compact and lightweight stand alone scope.
Have you discovered the four icon quick screen yet? It makes using the Patrol in the field a breeze. Iirc, the four icons are programmable, but default is NUC, 2x, polarity and photo capture. In the field, the only reason to access the full menus is to adjust brightness, or occasionally contrast. Find the quick screen by depressing the joy stick as if to turn the unit off, but release before the unit turns off and when the four icons are displayed. To return to the full menu do the same.
On the last menu page, iirc, you can set refresh to 30htz, which is fast enough and will extend battery life compared to the default 60htz.
Using the Wilcox weapon mount, even when set up in front of a rear BUIS, I found no issues with eye relief. You can move the Patrol rearward without BUIS's and the UNV DLOC mount allows it to go even further rearward. Without BUIS's it will mount, using the UNV mount, so that the end of the eye piece, not including rubber cup, is over the buffer tube nut, behind the charging handle. I like it that far back myself, but using my MK II, which has the same occular and which mounts with the ocular in the same location when mounted as far back as it will go without BUIS's, I managed to creep the stock and cut my nose and brow firing my 6.8 while predator huntingMonday night. (The eye pieces are not attached well and I have lost both the MK II's and the Patrol's in the field.) You really shouldn't have an issue with eye relief. Maybe post a photo?
JPK