Which arm tube are you using? Arm tube matching is critical with this arm.
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I've just gotten interested in Morch arms and stumbled across your "looking for help" thread. In my search for more information (could any site be less helpful than Morch's?) I found a Denmarck dealer's site. They have an English translation of the instructions for both the UP-4 and the DP-6. Translation is a little funky but I'm sure with the arm in front of you you could work everything out. Here's the URL, hope you find it helpful.