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Did polish the edge of the wheels... for less resistance..lol Can't do that, chrome adds weight! The main frame is all aluminum, plastic bearing support blocks and blocks to hold the wheels on and straight, then steel shafts and bearings. Plastic gears of course too. Weighed about .6 kg.
Sister in law is graduating as an ADN today. Was a bit of a struggle, but she pulled through as we all thought she could. Not bad for a high school drop out... She had already gotten her high school diploma though, it was just getting her to be willing to put in the effort to do more than CNA work.