After reading your post I can understand the reasoning for wanting the cross-over however as a Tornado nav somewhere towards the end of the first tour and considering a pilot cross-over I might be able to shed some of the latest advice. That is, there is almost no hope in hell in you or anyone at your stage AT THE MOMENT getting a pilot cross-over. This is due to there being a back log in the training system of considerable months and there not being enough navs anyway. If I were you, I woudn't even mention it when you get to Tutor's or indeed throughout your training, some of the old and bold see that as not being committed. You'll have a hard enough time anyway. First, pass each course, get streamed FJ, get through the OCU, get on a Sqn and provided you have got that far, at some point in your first tour make some enquiries. Right now, no-one will really take you seriously, especially your poster who doesn't give a sh*t until you are productive.
Concentrate and what your doing now, not some pipe dream.
Skyhigh