Being a fan of articulated logging loco's I recently bought an almost mint second hand 81180 (first production series) Climax. Searching the forum I found that there are several issues with smooth running due to the drive train. Improved parts can be bought from the parts shop. Any tip on what exactly I need (preferably the part/cataloque number) is highly appreciated. Also tips on how to install a decoder (I am not a novice with decoder installations) and disassembling are very welcome. Being Dutch, please excuse any improper English