I was thinking the fatter shaft could put me in the 12 ring instead of the 10 on the 3-D course. Matt/ Pa, how heavy are those linjammers. I havent looked into the CX area at all yet, and have no experience with them. I am thinking a 380 grain Fatboy 400 sounds good. It should give me plenty of speed, well all i want anyways. I may be overspined at 62 lbs, though. Most of this stuff is new to me, so bear with me guys.