Mask 6x6 format for Rollfilmholder "K" on Mamiya RB67 (Part 1)

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I am using a "K" Rollfilmholder (Original created for the Mamiya Press series) on my Mamiya RB67. This rollfilmholder has three formats: 6x4.5, 6x6 and 6x9. On the backside you can choose the format by a slider (see picture). You have to attache masks for 6x4,5 and 6x6 to the rollfilmholder. If you leave them you have 6x9. The original masks are made of thin metall, but are not always shipped with the K Rollfilmholder, when you buy them second hand. I've got the luck to get them ;O) So I have made 3D-Prints and tested them. Additional I have made masks (for 6x4,5 and 6x6) for the focusing screen with latches, so they will not move around and you don't have to glue them with doubletape to the screen (see picture). The ladder format (6x9) is not usuable for the RB67 (as I know), but I have made a mask for 6x8 which I can use (in original there is a motordriven rollfilmholder for 6x8 for the RB67). Just choose 6x9 format, insert the mask on the rollfilmholder and you are ready ;O) Between the Rollfilmholder and the body you need to attach a M- and P-Adapter instead of the usual Rotation Adapter. But than it fits. So you can use 3 formats with one rollfilmholder - but the best thing is, you have 6x6 format, for which there is no original rollfilmholder for the Mamiya RB67 This is now the 1.Part with files for 6x6 format: Additional Information: The negativs of the first try where 56mm hight and 54/55 mm width (see picture). I have improved the width, so the negative shoulds be now 56mm. I have reduced the height of the nochtes (left and right of the extract), so that the dark slider fit now. If they are to high, you can remove the darkslider but can not insert it back again. The other formats will follow soon... Hope you find it usefull ;O)