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Excellent, thanks for all this info.
I have re-done everything this morning, it seems to be working ok so far, i would say the only thing is it's a bit lazy going from the smallest 11t sprocket up to the next gear, but it's fine up and down the rest of the cassette. I think it might need a retune after a few rides
mcmyk
@gfk_velo
If it will shift correctly one way and not the other, and all other factors around alignment are catered for, that suggests a spacing issue, a derailleur set up error (in some circumstances), friction in the cable system or incorrect cables.
Check:
Cassette spacers are correct - Krankers is not strictly correct, they are only "all the same" on the Potenza and Centaur cassette - Chorus (which is used on many occasions with the Centaur group), Record and Super Record all have a 2.3 mm spacer between sprockets 6 and 5 (counting the smallest sprocket as number 1), all the other spacers are 2.2 mm.
Cassette properly tight (40nm tightening torque).
Cassette body properly tight on the axle (the fixing nut is LH threaded, 16nm torque).
"H" screw correctly set on the biggest sprocket / small chainring combo - especially if you are running a wide cassette like 11-29 or 12-29.
Campagnolo cables (not "compatibles") and new outers, also Campagnolo, metal (not plastic) ferrules. You'll read all over the place this makes no difference - it does.
Don't "California Cross" (unless the frame / cable guide system is designed specifically for it).
Internal cables - make sure the cables are not interfering with each other.
Under-bracket tunnel - make sure it's clean, that it's tight to the frame and that it's not worn - cables can wear a groove that eventually traps the inner, adding friction.
You generally have approx 1/2 turn of the cable adjuster lattitude each way from the perfect "sweet spot" (same as Shimano) so dialling in should not be super-hard.
Last - limit screws can affect cable tension but maybe not in quite the way you might expect - so, disconnect the RD cable, set the high limit screw without the cable attached, then attach the cable and tension. If you adjust the high limit screw with the cable attached, it may be the cable that is limiting how far towards top gear the RD can travel, so preloading the cable more than it would be pre-loaded by correct use of the limit screw & barrel adjuster.