Just to add to this thread, I have a 54 plate LCR with 70K on the clock.
Overall my gearbox is good(ish). It has no whining whatsoever, but has always been a bit clunky changing gear, especially 1st - 2nd, even when fully warmed up after a long (100+ mile) run.
Ive changed the gearbox oil for fresh OE Seat stuff
Ive changed the gearbox cable bushes for the aluminium ones.
Ive reset the cables to the linkages.
Finally I did the gearbox shim mod.
Its still no better.
I guess its something I'm just going to have to live with, but it does ruin the driving experience when you've got to nurse it into gear sometimes.
There was still a small amount of back/forwards play on the bearing after the shim was installed, I wonder if its worth putting another additional shim in...?
Have you tried replacing the plastic ball housing/bearing at the base of the gearstick? I forget the part no. now but a quick search would get it.