Hi rluitjens, there is a person that used to have all source of information for the Ranger 23. His name is a Arvel Gentry. arvelgentry.com is the website, is not active anymore but there is lots of info in pdf files that you will find very interesting. Also he used to have the owners manual for the Ranger 23 and send copies to members of the news letter for a fee. If you get any info about the manual and if he still make copies, please let me know. thanks!