The b4 is really good with the box setup on most all tracks. I sat there and tuned mine for months and without even knowing it, I ended up at the b4.2 kit setup, lol. A lot of the faster guys locally run the box setup. Although C hubs is popular in a lot of places, I dont see it much locally. I think most people are just playing with shock packages looking for the right amount of dampening and pack. In my experience, the b4 just need the kit setup and the right tires. If your a pro or on the cusp of becoming a pro, then you might require a bit more tuning. Most people that build their kits to the kit setup and come on here and say it handles poorly, have the wrong tires or they need to sauce them. Like you, I try to keep RC on a budget and tires are the most expensive part of racing. I have always known in my head that its about tires, tires, tires, but in my heart I am cheap, lol. Recently, I started chasing setups on my b4 and 22. The car was really not doing what I wanted. A local sponsored driver told me my tires were no good. I looked at then and said they look fine, about 80% tread left. Just before the main, he handed me a set of his "practice" tires. They looked like about 95% tread, so I tossed them on. they were the same tread pattern and compound I was running before, just newer. The car was great and was on rails. if I could pick a sponsor to give me free stuff it would be tires and rims. Sadly, if I want to "enjoy" racing and get the car to be more consistent and "feel" better. I need to buy tires more often. bleh. Also, I really like closed cell foams in the rear. I have been using aka red's and they are better on the second set of tires on looser tracks. Open cells just break down too fast for me, much faster than tire wear. I am referring to the rear tires. just use a sharpy, to mark a notch on them for each set of tires you used them in to track their age.