Roller cam idle RPM

Guess i better look at that mod then huh.Im always stressed out about turning it 7000 rpm lol.That would have to help.Yeah Ryan had those lifters made and ground the cam on a small base circle.Seems to work fine.I thought i heard a knock for a second yesterday(I HOPE NOT!)and pulled a valve cover.What i did find is that one lifter seemed to be hung up for better lack of words.I could move it away from the valve and it would stay.So i loosened the shaft assembly and moved the rocker a little then tightnened it back down.Seems ok now.Their Harland Sharps so their not shimmed between the rockers.I hope that wont hurt the motor.I would think they wouldnt do that.