I just received a set of Behotec C-50's with struts for my new project and am very impressed . By far the nicest and most robust units I've owned . They make the Robarts look like they were made with a hacksaw and file. The main body of the retract is machined out of one block of aluminum . The action of the retracts and struts are buttery smooth with no slop. The struts are also damped as well as sprung.

Marc