Quantity   Component name
1 × Servo Motor--no end stops https://www.amazon.com/gp/product/B073F92G2S/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
3 × Snowmobile bearings 20x42x12 https://www.amazon.com/gp/product/B002BBGPCS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1