Spent a rainy weekend digging through my "stuff" trying to put things in order. Anyway, ran across two sets of quick detachable mounts for Knight in-lines. Brand is Durasight. Material is all steel including bases and they look a lot like Warne-with the same side levers, but base design is different, and there are no internal springs. The only thing current I can find by this company is aluminum. Lord know where or when i got these, probably an estate or bankruptcy sale. Wondering if anyone has tried these?