yep, thats me.
What you posted is correct, you put the hall sensor between teeth of the same phase if in delta. and make sure you put it between same direction wound pairs between teeth as well. So if you put it between the Aa pair, make sure you put the other two between Bb and Cc pairs rather than bB and cC pairs, otherwise you will get 60deree. That is just using my mental picture so I could be a little off on that, you also have to get the sensor in between the right pair of teeth for the direction you put in the sensor, otherwise it will be 180degrees out, if that is the case, leave it in the same place, but just flip the sensor over to the other side to get it to 0degrees. If you want to hook up in WYE, you put the sensor between teeth of different phases, that advances the timing by 30degrees, you will still have to figure out which hall sensor goes into which input, either by trial and error, or scope it out.
Now comes the complicated bit. If you angle the sensors a bit you can advance or retard the triggering, advancing is good, retarding is bad, you need to advance the timing as frequency increases to counteract the increased impedance due to inducance of the coil. In many peoples experiance, actually advancing the hall sensor 30 degrees by putting it in the position for WYE connected motors, but actually connecting the motor in delta, produces better power at high speed than if the hall sensor were in its 0degree advanced position.
That problem should be fixed by using a smart controller, or something like burtie's timing adjuster, which is designed to compensate for inductance (hence more advance as speed increases). Read about that here if there isn't a link already in this thread viewtopic.php?f=2&t=19054
I have always had an oscilloscope to help me place my hall sensors so I don't have any tips on proper positioning without using a scope.
To figure out what the phase angle between teeth is you use the magnet / tooth ratio, for LRK that is typically 7 magnets for each 6 teeth, so since there is an odd number of magnets, you get 180degrees electrical difference equally divided by 6 teeth, so therefore each adjacent tooth is 30degrees different.