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I also think I have some H-shifter work to complete. Getting some very sloppy/unwanted gear-changes. From looking at good old GPLRA, I figure an extra 35 unwanted gearchanges on lap1 alone.
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D'oh! I eventually figured this out & just thought I'd share in case anyone else has similar...
I think that my G27 shifter has worn away slightly, so a couple of the gear positions now have more side-to-side movement than they should.
As a result, the pot positions end up where they should not.
I run it through a Leo Bodnar adapter & have just realised there is a configuration utility (which has not been required before!).
Indeed, could see the free-play in there. So just updated the horizontal values, so now when in 3rd/4th, the sloppy movement does not cross thresholds to quickly alternate between that and the position next door/2 gears away.
As a result of my belated findings, this potentially means my 2x worn out G25 shifters [in the secret spares cache in the loft] may have some further life if running via the Bodnar too...
Now to fix my driving, but unfortunately that's probably a lost cause.
Cheers,
Dave.