Is everyone running aftermarket axles that post low 60' times?

Once you reach 11.49 the rules get much more specific. You need a roll bar, jacket, dated belts, a blow shield, SFI balancer and flywheel, etc. So you'll find wonce you get faster, you need a bunch of safety stuff. An axle's no different. If you have a rev limiter and a factory limited slip, all that will happen if you break one is a high rpm free rev. Once you have a spool you must have them. Honestly, there's very little reason not to have them now. It's not really expensive anymore an you can upgrade to big bolt if you're small bolt now which helps with wheels and tires.