Optimize Mechanical Part for PETG

I need someone who can make me this 3D model. wheen can be sustitud for generic hardware sotre wheenls but the adjustable legs and base need to be desing from 0 https://www.etsy.com/listing/1595519657/chicken-wheelchair?ls=r&sr_prefetch=1&pf_from=shop_home&frs=1&crt=1&sts=1&content_source=ca35e5944f6cd0553db1bec82c7b9520%253ALTe9885bfa050e4b7014143c0076ed187bccb78e7e You would: • Deliver a final, watertight STL Once I run a quick slicer test and confirm there are no errors or red zones, I’ll mark the job complete.