Dual Bearing upgrade

Modified file to include 10X15X4mm bearings 2 per hub. also changed the drive hubs to only have teeth on drive hub and other is idler. you will need 8 of these 2 per wheel https://www.amazon.com/dp/B082PPYZQX?ref=ppx_yo2ov_dt_b_product_details&th=1 4 of these 2 per idler roller https://www.amazon.com/gp/product/B00ZHSRCFQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 also used some m3 screws 2x m3x10mm for drive hub 4x m3x20mm for idler hub and idler pully helpful tips for assmbly when assembling put the non drive hubs in first and insert the cap then screw the m3x20 screw into hub. this secures the hub from being able to pull out of bearings. then insert motors in place and slide on the drive hub into the drive hub then screw down the original motor mounts. when putting on the tracks slip over drive hub then non drive, then can install the idler with the m3x20 screw into position. printing use supports on the idler and non drive for the slot to prevent overhangs.