There's no recipe for this stuff. Some of the motors I've used for donor parts I don't even know what 'table they came from, and unless you can somehow find one with compatible properties some degree of circuit modification is inevitable. That's a lot to ask someone to walk you through on a forum, especially when they hadn't even completed the modifications themselves.
If you only needed one sensor the easiest path is to use the 'extra' one in your motor. The rotation direction sensor is the same as the commutation sensors, but it's fairly non-critical what it is replaced with. You could even disable the direction detection circuit and not replace it.
If you only needed one sensor the easiest path is to use the 'extra' one in your motor. The rotation direction sensor is the same as the commutation sensors, but it's fairly non-critical what it is replaced with. You could even disable the direction detection circuit and not replace it.