I've had one of the Cronus Tactical 7-42x60 scopes for about a year; optically speaking, it's a pretty good scope. The focus & eyepiece diopter are a little stiff on mine in cold conditions, but then I've only used mine a few times. I've never taken the time to try to attach my Terrapin LRF to the Cronus, but the supplied adjustable top mount would make it pretty easy to get the two optics to co-witness. The objective cover stays put ok, but the eyepiece lens cover would be very easy to lose, unless they've made some changes since mine was made. At the very least, you need some sort of string glued to it and tied to the scope body or some sort of an attached, hinged lens cover to replace the original one. I haven't been to very many matches since I got this scope, or I'd have had to taken care of this issue by now.