That would be an awesome addition, fluid heads are great. I would have issue with it, I dont know what they put in them for fluid, but I'd check the freezing temp. maybe it's oil, I dont really know, but check out how they function in extreme cold. . .
"Roadless areas, in general, represent some of the best fish and wildlife habitat on public lands. The bad news is that there is nothing positive about a road where fish and wildlife habitat are concerned -- absolutely nothing." (B&C Professor, Jack Ward Thomas, Fair Chase, Fall 2005, p.10).