Breakages

[mrP(Boonen)VT]

Adam,
I guess your anti Shimano jibe is aimed at me....but my "Campag" words of wisdom...

EITHER your return spring is knackered, or what is more likely is that the spring wears a groove in the mech, and sits at certain ponts and if used in the same gear for a long time, is reluctant to move from that point.

Guru P

[Jon H]

Sounds like Adam needs to do a bit of In-Gear Development

[-Adam-]

[quote="Jon Hemming"]Sounds like Adam needs to do a bit of In-Gear Development

[Antloony]

[quote="-Adam-"]it does do an awful lot of mileage in sheep crap ...

[Grahame]

It sounds like the pivots are slightly corroded (this happens with all makes of rear mrchs).

The fix is to soak it with lubricant (as you have) and then to work it back and forth by hand a few dozen times. This will wear the corrosion away and (hopefully) get things working nice and smoothly again.