Putting 6" of pipe in between the airfilter and MAF would also help it run better than it did with the cone filter on, however my finding was even on days where it had been low humidity and had not rained in days, it still ran like a spastic pre-schooler flailing the fuel mix controls.
Either way, it runs with lots of low end power now, better than it ever has for me, will know in 2 days just what a difference.