then go to support in bottom left.
then under the device picture you will see "change device". From here you can select Muso, Atom, Core or the new Nova. Then manuals will change.
No exact promise on dates, but based on Atom going from certification to delivery it was a week to ten days. So think your dealer is realistic to suggest September. I placed a deposit in November'16 so hoping mine will near the top for early delivery in the month.