Somewhere here in the archives is DVW response and DIAGRAM to his ISKY lifter issue in relation to a failure he had of a bushing... IIRC, at that time, some speculation was that because a portion of oil circuit in the lifter body went below the bore there was momentary bleed-off. To further speak to that...It appears now after replaceing the one? lifter that is has been very reliable for several passes ALTHOUGH THERE STILL IS THE SAME LOSS. I do remember him saying his lifter to bore clearance is pretty large too. I'll see if I can't prod him to read/reply here.