Great documentation Hessel!
(Nooit weghalen!)
Oliver,
Indeed I am wondering if my suggestion could be the problem.
That means there has been made a mistake during the build.
Did you build it yourself?
You'll definitly have to dismantel it and you'll see what went wrong.
(I hope you didn't exchange parts, then you'll have to search for the counterparts you've mixed up

, or is it a Colinbus hiccup again

)
Pieter