It's great to see that there is another D413 in Canada, unfortunately the setup in the manual is pretty old, at the time that setup was used we had only about a month on the car and we were still learning. By the description of the track I would start with my Gunsmoke setup on my website. As far as the AE shock springs go, I'm not sure why so many people like to use the AE springs, Torrance worked very hard at making the HB springs super consistent with very small weight increments between each spring to so you can basically get your car dialed in in any way you want. I would strongly suggest giving them a try, before we had the HB springs we used Kyosho springs but found the HB springs more consistent with a better feel on the track.