You may address me informally ("du").
We didn’t realize the carport because we are switching to a garage. Everything went smoothly; someone came for the measurement a few weeks beforehand. Even changes I sent later by email were still taken into account. Contact was, as mentioned, very good in broken but understandable German.
Our selection was limited because not everyone delivers to the edge of the Black Forest. Here, nationwide routes are organized. After the second and last day of work, the three guys continued on to Lake Constance.