... ah, Gimpgimp, the real problem lies in having a sufficiently robust tape measure attached to your wingtip to determine just how far you are out from the centreline on downwind ... so that you can relate bank to radius of turn to the actual base turn diameter you might be trying to achieve ...
.. could it be said that we might be .... "going around in circles" ?
Like JF, I too would like to find out how to reduce my tyre wear and tear during parking operations ....