hi jali, here are some real photos from what we need: https://www.baumuster.ch/datas/image...r/Treppe_01.jpg https://www.blattermueller.ch/cms/im...2_Treppe_OG.jpg https://www.stadler.de/img/treppen/s...gswerkstatt.jpg https://www.kielmeyer.de/pic.obj/3405-lang5%23treppe.jpg hope we get two or three reference photos tomorrow. and we would need the model untill next monday or earlier. can you give us some figures about your rate or can you estimate the cost? thanx lars