I must be missing something, I feel like I have invested in both tools and knowledge and have not gained much. I have built several cars this year, I know that I have tried a couple different ideas on the cars and have not seen much difference between them. I have three cars with extended wheel bases, one with stock wheel base. All cars have a raised wheel and ride the rail. All have drilled axle holes and the rears are canted, all drilled with the block. COM on all cars range from 7/8 to 1" I used tungsten weights and all but one car are planks. with the most recent being 3/8 inch thick with 1/4 weight pockets, the rest have all the weight at the rear. The one car that is not a plank is a mild wedge. Wheels are out of the box, with three cars having the wheels done with DD4H bore polishing kit and red rocket. I did the fourth car with the same but do not think I followed the directions as well. Wheels have had the step removed and I coned the inner hub, all using the Derby worx tools. I did not use the wheel saving tool, I think that is a bad idea after looking at it and trying it last year. I used DD4H graphite and really worked it in, the axles also have had the DD4H work done to them using the polish, I used the derby worx tool to make the axle straight and mushroom the head some. filed off the burs and stuff also. In the end all cars came in at 5oz. one car has run a 3.33, one a 3.38 and for the most part they all run from a 3.40 to a 3.43. When I see the times I wonder what I am doing wrong, a couple of cars were not far behind and I know they did not do what all we did, as well I see other people post about how they have cars that run right at 3.00 to 3.15, where is these other 2 tenth's that I am missing. I do not see how the track can be that much, I do not see how other people using very similar parts are so much quicker than my cars. Even the car I built last which should have been the best car based on doing a better job than the other three cars was actually slower than the others. I am really lost on this. I am not sure I want to spend the money to send a couple of cars to the next race knowing I will be the last car across the finish line every time. i want to race but I want to be close to having a chance. right now I am not sure I would ever be.