No trouble. There is a pretty good description how it was done in the book, and I believe there is some address there provided for questions,...
Try to find a book (Searching for Huck in Balkans) - there is description of similar raft and I believe they promise to give out plans for it[ATTACH]
Something like this? Searching for Huck in Balkans...
Try to google "Searching for Huck in Balkans" - in the book they described a raft with almost identical requirements you are looking for. They...