i have been really thinking about getting into nitro for awhile. I have never messed with or driven a nitro truck before so i am a little unsure. I am a quick learner tho. are they really that hard to keep running or tell me what you guys think. some pro's and con's would be nice. and biggest thing, which truck? i like the short course trucks and don't have one yet thats why i was thinking the slayer...