I'm Tamas from Hungary (Europe) a new kayak traveller

After few week searching on internet I have bought 2 AE kayak's one Airtraveller (new version of Expedition) for me and one Frame for my son both with premium package (back bone, durafloor, seat cushion). They are the blue 2015 models of AE. First impression is very good (I have pumped both on our terrace) but correct position of back bone not easy.
I plan a short tour (20km~13 miles) this weekend I hope all will be fine.