You're right, electrical brakes are not allowed in all parts of europe, like the Netherlands for example, but there are other countries in Europe that do allow these brakes like the UK, so we had to import our Airstream through UK, and so legalised the electrical brakes on the Airstream.
They have this rule (thank God), that says a vehicle with registration in any EU state, has to be accepted without changing the brakes, if sold to a person in another EU state.
We discovered this rule, and used it, as we think electric brakes work better than surge brakes.It's easy if you know how to work your way around legislation...
We will try the voyager this weekend, see if it works..
Thanks for thinking with us !