I have seen that a couple of you have replaced the innards of your A/C with the SE kit. This allows you to use the stock cover, etc. My question is- do you feel like the stock cover allows enough air in to see an improvement overall? I know the filter allows more in, but does the forward facing cover? Is it as good as a completely open round unit such as the Big Sucker? Or a cone shaped unit like the Heavy Breather? Just wondering since that is probably the cheapest route..