i'll be honest, the best money i ever spent (on motorcycles) was for a GMD Computrac measurement and tune. after that setup, the bike (SV650) was rock solid and ended up winning me a championship. without that setup, i would likely have never gotten it right. i could have twiddled knobs and adjusted geometry until i was blue in the face. i could have drudged through the forums making adjustments that other racers recommended. but, all those recommendations are setup specifically for them. by paying a pro, you will get the personalized service and advice that will help you get faster. plain and simple. the following approach worked for me: trust the expert tuners. BUT, do your own research and understand the method and science behind geometry, damping, and springs. also, work on describing your handling symptoms to your tuner, as well as understanding the jargon. (for example, when talking about damping with your tuner, they will likely want to talk in terms of "fast" or "slow", as opposed to "hard" or "soft")