Mudslinger go-kart not worth the Price

#BlackFriday Salesperson was very good at the store and assisting us. Very helpful. Was at the store 29 Nov 2019 and purchased Mudslinger go-kart. Once we got home and assembled it, the extension bar frame was very weak so not ideal for a tall person and a weight over 40kg. My son is 43kg and tall and the middle section to extend the length of the unit to allow tall people, it sags while riding. So it's unstable and going over a hump or incline, that middle section can touch the ground. The braking system is also not good as the front tyres skid quite a distance before the kart comes to a stop and by that time, alot of the Tyre thread marks have left lines on the road, so the tyre threads won't last long as well. Very unhappy for such an expensive go kart.