Finally got some inspiration to start with the model again
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All connections between the valves and hydraulic motors replaced with new parts. Those banjos are little smaller making it possible to keep the bigger servos (the blue ones) for blade and ripper functions. All tubing had to be redone to, changing here to a little smaller diameters.
Now remove and mount everything again, install lower oiltank, engine, pumps and outside oiltank (fueltank in 1:1). As you see, tracks and hubs removed to be able removing hydraulic motors. Have got a lot paint damages on frame, it was painted with 2 component paint, it's chipping. Guess something gone wrong with the primer, bare metal shown Most other part with 1 c paint with out problem
/dan