Hi Damien, I have done a little printing at home, but not with anything as flash as the pro1.
I do profile my paper using the colour munki and would like to suggest the following to see if it helps OTOS.
In The print file menu under printer set up go to print settings.
Chose the paper and print quality. goto main, color/intensity. chose manual and set matching to none. Then OK
Chose photoshop manages colours
Underneath it chose the appropriate printer profile, for paper type and printer
chose your prefered rendering intent and then Print the photo.
Ive found this guy to be helpful http://www.ronmartblog.com/p/printing-series-articles.html