Evolution 9
I have followed your posts for years and you make excellent points and out of experience.One of the problems when we talk about the OASYS UTM specifically is that it was marketed as a "military style (real) clip on that has collimation", but it was not really true, but most people do not know this. Unfortunately, this is where so many including myself got had and I was probably the second person to ever own one. As you mentioned you are not going to get repeatable results if the thermal device is not collimated to begin with.
People like Waddles0931 and another over on AR have reported their UTM's are collimated and some read these reports and roll the dice only to discover something other.
As far as the Wilcox FTS Mount I guess you would agree that since most UTM's and Skeet IR's are not collimated aka not real military clip on's you are not going to see repeatable results when in the FTS mount. So, I think this is where much of the shade stems from.