Design process does not start until they have received the vehicle or a delivery date, hence my question.
They must have changed their approach as all their published information indicates they start design work once you make a deposit. How big was your deposit? Their video on the process says the initial deposit is $35,000. Giving them $35,000 to just sit and wait for a delivery/date would be frustrating.
https://advanced-rv.com/path-to-delivery/
"Step 2.
Once your deposit is received, we will configure your custom chassis (color and options) with you and order it from Mercedes-Benz. After your chassis is ordered, we will start working with you to finalize configuration of the rest of your custom RV. When the configuration details are finalized, usually about one month after we order your chassis, we will provide you drawings and a firm price."
Perhaps because of delivery uncertainties with 2019 Sprinters. Hopefully Mercedes/Daimler will get their Sprinter deliveries on track. I have been thinking of making a deposit next Spring to get a new van in about a year in 2021.
In the mean time I'll keep traveling in my Airstream Interstate.