Great Photos Jaka!!!!!!!!!!!!!! Outstanding, nice and clear. A point of my own, I have opened up engines and most all of them have a coating of rust on the back of the crank, not as bad as Jaka is showing. Don't over think or worry about it, just the nature of the beast and something I clean up in the rebuild. However, the bearings are another story and if there is rust in them then I replace them.
Really good photos!!