Wot Nino saya - plus:
There are design problems with the targets - you can try making the stem more rigid, although I have never done this.
The lip that holds the target up can be filed down to make it shorter - be careful!
Sometimes there is excess slop in the bottom linkage - only real cure is better parts which can be hard to find.
Occasionally hooking the pull-down spring from the other direction thru the target hole can assist (if the spring is twisting the target).
good luck!
Ian
