Valve spring compressor......what's everyone use?

Had to add a short stud and nut to the end of C Clamp, to keep the spring pusher from sliding off the end of the C Clamp under high spring pressures. If it slips off, it will launch the retainer 30 to 40 feet across the garage. (Trust me on this). And could also damage your fingers. 20180926_042418.jpg