Assuming you mean the Trooper Mark III or Mark V, not the original Trooper?
The transfer bar and hand are always a loose, rather sloppy fit on the pins. I can only guess they were designed to be so.
In any case, other than an actually broken transfer bar or hand, I seldom ever saw any problems with these.
I can't recall ever seeing a broken, worn, or damaged pin.
As long as the transfer bar or hand isn't broken through the pin hole, the loose fit is not an issue. I have seen some fairly loose fitting parts, but they still worked as designed, and I didn't see any real benefit to a tighter fitting part.
These parts seem to be a case of they're either broken or they're not broken.
If they're not broken they work just fine.