Hi
Pete, I have fitted a fairly low tension spring to the top of push rod (It's an interference fit, though can be adjusted up and down, by twisting the spring, if that makes sense).
It is currently only about 2mm proud of tip of pushrod, though has silenced the Canary on a short test drive.
Won't likely have put any load on the crank thrusts will it ?, do you think (as a bit paranoid of this).
Thanks, Dave