The end caps are held on by an allen screw. it may be hard to see if the head is filled with crud. I removed the caps and carefully drilled and tapped out the hole to hold a small thumb screw which I could tighten with my fingers. Carefully slide the standards off each end to be able to leave the tripod bracket on the rail.
Yes these cameras are heavy and awkward to use in the field. But they take the same quality of image as a camera that costs $2500. For me when I started out the price of the camera afforded me the opportunity to buy two very nice lenses.