Has anyone attempted to fabricate a valve spring holding tool? I made the other two wrenches and they came out pretty nice. But I'm still short of a set. I've got a 30mm openend that I used on my first attempt, but it would slip off alot. Although I finished the job, it was a pain. At those times I always remember an old pipefitter telling me, slow down son, let's work smart, not hard. Sometimes that's hard to remember. Thank's for any feedback. C.J.