I'm in the process of dismantling my XRL (only got 2 miles on it!) to get it "right":p I have the usual goodies on the way but now I'm thinking about skipping the jet kit and going for a pumper. Could someone please answer the following ???s 1. Is there a clear best choice as far as brand? 2. How do you tune one? 3. Is there really a significant benefit over a properly jetted stock carb? 4. Any downside (aside from price!)? Thanks!