Regarding using an untrue wheel in ther bike inconjunction with a Park , or similar approved, tool, is a valid work around to rotate the wheel to positions A, B, C and D with the pointer of the tool? I did this the other day, using the valve as a handy marker.
Assuming the untrueness of the wheel is a wobble in the rim and not a more serious failing, I can't see why this won't work.