I have tested Krypton 2 XG50 for about a month.
99% of time I used it as hand held thermal monocular with Pulsar 3x20 monocular.
But I have also tested it on shooting range on 223, 308 and 30-06 calibres.
All rifles were fitted with 50mm objective scope, so I was able to use the same PSP-B adapter, just changing inserts that comes with it.
There was no shift of POI, even when I deliberately positioned Krypton screen way off scope reticule.
If you will encounter any shift of POI, you have possibility to adjust POI within the device for three different profiles (rifles).
Here it is only allowed to hunt boars at night, not even foxes or jackals. So having a dedicated thermal rifle is of no logic.
But Krypton 2 is compact enough to be used as hand held spotter and in those rare moment, when you need it as front add on, it will do the job. And you can keep your prime glass scopes.
Just make sure, that base magnification is not too high. My scopes are either 3x or 2.5x base magnification and that is good enough.