I'm looking at the valve spring compressor made by Richard Troutt. I like the two position handle, I think that's the way its made? How hard is it for one guy to use? I'm an old man,but I can still power shift,anyway is his number still good . I would rather have the Mancini style one if anyone got one to sell. I'm replacing valve seals. I think by now after searching for a spring compressor I could of just pulled the heads and been done. Thanks for any info. Ed Also do you have to remove the rocker arms to use RT style? Thanks again