Sorry, had not read the post properly and assumed it was talking about shape not actual path on the map. As stated, radius does not matter, the main thing is that you are correct on the inbound track and the timming is right, rate1 should be used for the turns where this is appropriate for the a/c ( most light a/c).
n.b. an Airbus WILL pretty much follow the pattern rather than fly 3Xdrift outbound, but of course this is done by the computer.