Hello. I own a 2004 Evader 100-S- 48v 1000w motor, 3.50 Tire size. I have learned a lot reading the posts here as I knew nothing about electrics before. I am still very much a beginner. I smoked the stock controller and need a replacement. Kelly controllers are reasonable. They have a small, 60V, 100A for $150. Although it appears stronger than the stock, should I go a step up to to the 24V-72V 200A for $280. My aspiration is to add an additional 24v (smaller AmpHr). I have also read that different tires will help with increased speed. Because anything is better than the current top speed of 23-25 mph. I thank you for your advice.