I don't have JJ's. Maybe this helps http://www.armadaskis.com/news/article.php?id=96
"... urban slopestyle contest that takes place right down the middle of the city's streets. JP Auclair skied his new pro model, which is a backcountry/all mountain ski with rocker, on the icy hard slopes of the comp and the ski handled perfectly. JP was rocking 720s over the gap, and sliding the box at the end on a 116mm wide backcountry ski! .... "
JJ uses Armada's ultralite core made for pow float and the narrower edges compared to their tougher big edged park models like AR6. It may a big ouch if u crush and edge....
They should be easy to spin on because the early taper would give you a reduced swingweight, not sure about rails though. I would just get some shit skis for rails.
Oh yeah, my JJ's get here tomorrow. Sweeeeeeeeeeeeet.
^^^^ ya i figured that...i just didnt wanna believe it since i threw so much money into them