Happy new year 2014 ! 
ok i´m sold
i´ll give them a try. This set right ?:
http://www.ebay.co.uk/itm/LANG-tool...t=UK_Hand_Tools_Equipment&hash=item2a2ea77d7c
or rather this ?:
http://www.ebay.de/itm/SNAP-ON-GEWI...pt=Motorrad_Kraftradteile&hash=item3cd95e50b2

Yes to left or right hand threads. In the set I have, two cover SAE 9-30tpi (maybe 32? I'd have to go check), and one covers metric thread pitch 0.75-3mm. Sykes Pickavant (and presumably some other brands) also do BSW/BSF versions.
I haven't tried them yet myself to say exactly what they will and won't accomplish, nor how easy they are to use; it worked well enough for the guy who sorted my grinder for me to want a set though. And they're cheap enough that if they get me out of a jam once or twice they'll have paid for themselves.
There's videos on youtube in case it's not obvious how they work:
ok i´m sold
http://www.ebay.co.uk/itm/LANG-tool...t=UK_Hand_Tools_Equipment&hash=item2a2ea77d7c
or rather this ?:
http://www.ebay.de/itm/SNAP-ON-GEWI...pt=Motorrad_Kraftradteile&hash=item3cd95e50b2
Made in Germany ? 


