Horst:
That is an amazing job you took on yourself. I would really really like to see your photo essay when you have time to collect the photos. I know it is possible to replace the chain plates yourself, but wow that has to be a ton of work. 100 hours actually sounds rather fast for doing yourself. I know the factory can usually do this job in a week or two, but that is with 2 or three people working on the job. Outstanding job.
Also, BIG CONGRATULATIONS on your circumnavigation. You inspire me and any and all photos and stories you can share on that would also be appreciated. I can not wrap my head around that at this point and we have sailed Maine to the Bahamas now three times. Congrats, you are in a class of few with that voyage.
Hayden