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The original was posted on /r/engineeringporn by /u/SKAviusAvem on 2023-11-21 19:57:43.

Original Title: Client who makes lifts for the disabled was developing a hybrid lift and stairs called “transformer”. He found me and asked me to improve his design. He asked to make it simpler, more compact and to maintain a minimum load of 200 kg (441 lb), as his previous designs were very heavy and bulky.