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I hope this had not been discussed before. At least I wasn't able to find a thread about it by search function. It is about the guard fences of the DD51. I came across some detailling parts for DD51 on Hobby Search site. Guard Fence by Treasure Town at Hobby Search All my KATO DD51s (DD51-500 series) don't have this detail. I have those fences on my DD54 (Zoukei Mura) and my DF50 by Tomix. For the DD50 I had read the fence was installed to prevent operator to touch the vents near the door. I can understand this but both the DD54 and the DD51 have these fences covering the lower part of the door, a window and the cab side below the window. I m arked these fences in red. I allso noticed that the DD51-1000 (the one with the higher doors below the cab floor (green marked) always has these fences (at least nealy always). At least by the images I had seen the DD51-500 often had no fences or less fences. Is there a reason for this differrence? Or is it just my observation by the few images I had seen? Another question is what is the blue marked hook for? Grabbing a token to secure the operation on single track lines? Might these fences be a security installation to make grabbing whatever with the hook safe for the surrounding area? Thank you in advance, folks for any reply. Have a nice Sunday evening!