If your low id take a guess its your ARB rubbing on your driveshaft
It looks like you were correct! i have raised it another centimeter or two, and it doesn't seem to be making any noises, though i only tried it a few times.
I have another problem now though

one side of my golf raised up fine, the cogs didn't take any effort to turn, then when i did the other, i got about half way up, then all of a sudden the cog jammed. i have tried turning both ways but it seems to be well and truly stuck. i cleaned all around it with a compressor, a brush and brake/ clutch cleaner which worked well on the other side, but whatever is stopping this from turning now looks as if its inbetween the cog and the coil. Has anyone got any ideas on how to unjam it?