Valve spring removel tool

I just used the cheapo auto parts store version shown above with the dial crank on top. Worked great with the engine in the car. Yellow nylon rope through the spark plug holes to keep the valves up.It naturally coils as you feed it in, rotate engine to snug the piston up to it. I don't have air, but would probably still use the rope if I did, it's just such an easy process.