I was just watching a short video of Paul swindell he does not train his late breds he let's them mature naturally over the winter. He only starts training them 4 weeks before the 1st race and he also avoids north winds during training as he wants them to only experience that on a tough day as they will just keep flying as they don't know any better. An experienced doo will just take cover rather than fly into a strong North East wind. Paul has timed his late breds out of 620 miles. Its something to consider.