I guess this could be for any espin model but I specifically have a sport. I need to get a new seat. The stock seat is killing my bum and its really becoming bothersome as I been riding a lot lately, I also want to get new pedals I dont like the grip on the stock ones they can get stuck in certain shoe tread. Besdies that I was thinking about getting some grips too but just for aesthetic reasons. What mods or replacement parts have you guys done to your espin?